656872201 has 4 divisors (see below), whose sum is σ = 657823504. Its totient is φ = 655920900.

The previous prime is 656872187. The next prime is 656872213. The reversal of 656872201 is 102278656.

It is a happy number.

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 656872201 - 2⁵ = 656872169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656872291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474615 + ... + 475996.

It is an arithmetic number, because the mean of its divisors is an integer number (164455876).

Almost surely, 2^656872201 is an apocalyptic number.

It is an amenable number.

656872201 is a deficient number, since it is larger than the sum of its proper divisors (951303).

656872201 is an equidigital number, since it uses as much as digits as its factorization.

656872201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951302.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 656872201 is about 25629.5181577805. The cubic root of 656872201 is about 869.2812141219.

The spelling of 656872201 in words is "six hundred fifty-six million, eight hundred seventy-two thousand, two hundred one".