656903479 has 4 divisors (see below), whose sum is σ = 657006976. Its totient is φ = 656799984.

The previous prime is 656903461. The next prime is 656903491. The reversal of 656903479 is 974309656.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656903479 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 (656903419) 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, 41559 + ... + 55144.

It is an arithmetic number, because the mean of its divisors is an integer number (164251744).

Almost surely, 2^656903479 is an apocalyptic number.

656903479 is a deficient number, since it is larger than the sum of its proper divisors (103497).

656903479 is an equidigital number, since it uses as much as digits as its factorization.

656903479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103496.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The square root of 656903479 is about 25630.1283453673. The cubic root of 656903479 is about 869.2950112990.

It can be divided in two parts, 65690 and 3479, that added together give a square (69169 = 263²).

The spelling of 656903479 in words is "six hundred fifty-six million, nine hundred three thousand, four hundred seventy-nine".