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81362029 = 747247301
BaseRepresentation
bin1001101100101…
…11110001101101
312200002121201111
410312113301231
5131312041104
612023512021
72005365040
oct466276155
9180077644
1081362029
1141a21551
12232b8611
1313b19318
14ab3cc57
157222404
hex4d97c6d

81362029 has 8 divisors (see below), whose sum is σ = 94963968. Its totient is φ = 68254800.

The previous prime is 81362027. The next prime is 81362033. The reversal of 81362029 is 92026318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81362029 - 21 = 81362027 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81362027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123322 + ... + 123979.

It is an arithmetic number, because the mean of its divisors is an integer number (11870496).

Almost surely, 281362029 is an apocalyptic number.

It is an amenable number.

81362029 is a deficient number, since it is larger than the sum of its proper divisors (13601939).

81362029 is a wasteful number, since it uses less digits than its factorization.

81362029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247355.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 81362029 is about 9020.0902988828. The cubic root of 81362029 is about 433.3185256610.

The spelling of 81362029 in words is "eighty-one million, three hundred sixty-two thousand, twenty-nine".

Divisors: 1 7 47 329 247301 1731107 11623147 81362029