656348239 has 4 divisors (see below), whose sum is σ = 662720656. Its totient is φ = 649975824.

The previous prime is 656348221. The next prime is 656348299. The reversal of 656348239 is 932843656.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 656348239 - 2⁵ = 656348207 is a prime.

It is a super-2 number, since 2×656348239² = 861586021676802242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656348299) 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, 3186054 + ... + 3186259.

It is an arithmetic number, because the mean of its divisors is an integer number (165680164).

Almost surely, 2^656348239 is an apocalyptic number.

656348239 is a deficient number, since it is larger than the sum of its proper divisors (6372417).

656348239 is a wasteful number, since it uses less digits than its factorization.

656348239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372416.

The product of its digits is 933120, while the sum is 46.

The square root of 656348239 is about 25619.2942720911. The cubic root of 656348239 is about 869.0500217731.

The spelling of 656348239 in words is "six hundred fifty-six million, three hundred forty-eight thousand, two hundred thirty-nine".