656948031 has 4 divisors (see below), whose sum is σ = 875930712. Its totient is φ = 437965352.

The previous prime is 656948029. The next prime is 656948041. The reversal of 656948031 is 130849656.

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 656948031 - 2¹ = 656948029 is a prime.

It is a super-2 number, since 2×656948031² = 863161430869553922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656948041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109491336 + ... + 109491341.

It is an arithmetic number, because the mean of its divisors is an integer number (218982678).

Almost surely, 2^656948031 is an apocalyptic number.

656948031 is a deficient number, since it is larger than the sum of its proper divisors (218982681).

656948031 is a wasteful number, since it uses less digits than its factorization.

656948031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218982680.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 656948031 is about 25630.9974640083. The cubic root of 656948031 is about 869.3146630729.

The spelling of 656948031 in words is "six hundred fifty-six million, nine hundred forty-eight thousand, thirty-one".