656467321 has 4 divisors (see below), whose sum is σ = 656582544. Its totient is φ = 656352100.

The previous prime is 656467303. The next prime is 656467337. The reversal of 656467321 is 123764656.

656467321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 656467321 - 2⁵ = 656467289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656467351) 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, 48595 + ... + 60616.

It is an arithmetic number, because the mean of its divisors is an integer number (164145636).

Almost surely, 2^656467321 is an apocalyptic number.

It is an amenable number.

656467321 is a deficient number, since it is larger than the sum of its proper divisors (115223).

656467321 is a wasteful number, since it uses less digits than its factorization.

656467321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115222.

The product of its digits is 181440, while the sum is 40.

The square root of 656467321 is about 25621.6182353886. The cubic root of 656467321 is about 869.1025761696.

The spelling of 656467321 in words is "six hundred fifty-six million, four hundred sixty-seven thousand, three hundred twenty-one".