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64057079 = 253125309
BaseRepresentation
bin1111010001011…
…0111011110111
311110112102210102
43310112323313
5112344311304
610204544315
71405322222
oct364267367
9143472712
1064057079
1133182039
121955209b
131036a7c8
1487165b9
155954d1e
hex3d16ef7

64057079 has 4 divisors (see below), whose sum is σ = 64084920. Its totient is φ = 64029240.

The previous prime is 64057073. The next prime is 64057087. The reversal of 64057079 is 97075046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97075046 = 248537523.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-64057079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64057073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10124 + ... + 15185.

It is an arithmetic number, because the mean of its divisors is an integer number (16021230).

Almost surely, 264057079 is an apocalyptic number.

64057079 is a deficient number, since it is larger than the sum of its proper divisors (27841).

64057079 is a wasteful number, since it uses less digits than its factorization.

64057079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27840.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 64057079 is about 8003.5666424414. The cubic root of 64057079 is about 400.1188792491.

The spelling of 64057079 in words is "sixty-four million, fifty-seven thousand, seventy-nine".

Divisors: 1 2531 25309 64057079