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1189629081 = 32114972
BaseRepresentation
bin100011011101000…
…0100110010011001
310001220111102022100
41012322010302121
54414021112311
6314013514013
741323452234
oct10672046231
93056442270
101189629081
11560572a33
122924a2909
1315c602b44
14b3dd041b
156e68ca56
hex46e84c99

1189629081 has 9 divisors (see below), whose sum is σ = 1718502591. Its totient is φ = 793017072.

The previous prime is 1189629073. The next prime is 1189629101. The reversal of 1189629081 is 1809269811.

The square root of 1189629081 is 34491.

It is a perfect power (a square), and thus also a powerful number.

1189629081 is a `hidden beast` number, since 1 + 18 + 9 + 629 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 713691225 + 475937856 = 26715^2 + 21816^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1189629081 - 23 = 1189629073 is a prime.

It is a super-2 number, since 2×11896290812 = 2830434700721809122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1189629031) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 97725 + ... + 109221.

Almost surely, 21189629081 is an apocalyptic number.

1189629081 is the 34491-st square number.

1189629081 is the 17246-th centered octagonal number.

It is an amenable number.

1189629081 is a deficient number, since it is larger than the sum of its proper divisors (528873510).

1189629081 is an frugal number, since it uses more digits than its factorization.

1189629081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23000 (or 11500 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The cubic root of 1189629081 is about 1059.5883891964.

The spelling of 1189629081 in words is "one billion, one hundred eighty-nine million, six hundred twenty-nine thousand, eighty-one".

Divisors: 1 3 9 11497 34491 103473 132181009 396543027 1189629081