656932397 has 8 divisors (see below), whose sum is σ = 717005280. Its totient is φ = 596918160.

The previous prime is 656932379. The next prime is 656932421. The reversal of 656932397 is 793239656.

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 656932397 - 2¹² = 656928301 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 (656932307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10679 + ... + 37787.

It is an arithmetic number, because the mean of its divisors is an integer number (89625660).

Almost surely, 2^656932397 is an apocalyptic number.

It is an amenable number.

656932397 is a deficient number, since it is larger than the sum of its proper divisors (60072883).

656932397 is a wasteful number, since it uses less digits than its factorization.

656932397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29323.

The product of its digits is 1837080, while the sum is 50.

The square root of 656932397 is about 25630.6924799156. The cubic root of 656932397 is about 869.3077670564.

The spelling of 656932397 in words is "six hundred fifty-six million, nine hundred thirty-two thousand, three hundred ninety-seven".