657423607 has 8 divisors (see below), whose sum is σ = 681184080. Its totient is φ = 634083840.

The previous prime is 657423601. The next prime is 657423623. The reversal of 657423607 is 706324756.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657423607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 657423607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657423601) 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, 101994 + ... + 108247.

It is an arithmetic number, because the mean of its divisors is an integer number (85148010).

Almost surely, 2^657423607 is an apocalyptic number.

657423607 is a deficient number, since it is larger than the sum of its proper divisors (23760473).

657423607 is a wasteful number, since it uses less digits than its factorization.

657423607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210353.

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 657423607 is about 25640.2731459710. The cubic root of 657423607 is about 869.5243830958.

The spelling of 657423607 in words is "six hundred fifty-seven million, four hundred twenty-three thousand, six hundred seven".