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189506079 = 3272429719
BaseRepresentation
bin10110100101110…
…10001000011111
3111012120220110200
423102322020133
5342003143304
630445434543
74460526600
oct1322721037
9435526420
10189506079
1197a757a4
125356ba53
1330351999
141b24dda7
1511984e39
hexb4ba21f

189506079 has 18 divisors (see below), whose sum is σ = 318422520. Its totient is φ = 108288936.

The previous prime is 189506017. The next prime is 189506081. The reversal of 189506079 is 970605981.

It is not a de Polignac number, because 189506079 - 216 = 189440543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189506099) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 214419 + ... + 215300.

It is an arithmetic number, because the mean of its divisors is an integer number (17690140).

Almost surely, 2189506079 is an apocalyptic number.

189506079 is a deficient number, since it is larger than the sum of its proper divisors (128916441).

189506079 is a wasteful number, since it uses less digits than its factorization.

189506079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429739 (or 429729 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 189506079 is about 13766.1206953884. The cubic root of 189506079 is about 574.3911175329.

The spelling of 189506079 in words is "one hundred eighty-nine million, five hundred six thousand, seventy-nine".

Divisors: 1 3 7 9 21 49 63 147 441 429719 1289157 3008033 3867471 9024099 21056231 27072297 63168693 189506079