656427073 has 4 divisors (see below), whose sum is σ = 666224560. Its totient is φ = 646629588.

The previous prime is 656427071. The next prime is 656427091. The reversal of 656427073 is 370724656.

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 656427073 - 2¹ = 656427071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656427071) 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, 4898643 + ... + 4898776.

It is an arithmetic number, because the mean of its divisors is an integer number (166556140).

Almost surely, 2^656427073 is an apocalyptic number.

It is an amenable number.

656427073 is a deficient number, since it is larger than the sum of its proper divisors (9797487).

656427073 is an equidigital number, since it uses as much as digits as its factorization.

656427073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9797486.

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 656427073 is about 25620.8327928660. The cubic root of 656427073 is about 869.0848142520.

The spelling of 656427073 in words is "six hundred fifty-six million, four hundred twenty-seven thousand, seventy-three".