656806223 has 2 divisors, whose sum is σ = 656806224. Its totient is φ = 656806222.

The previous prime is 656806219. The next prime is 656806243. The reversal of 656806223 is 322608656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656806223 - 2² = 656806219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656806243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328403111 + 328403112.

It is an arithmetic number, because the mean of its divisors is an integer number (328403112).

Almost surely, 2^656806223 is an apocalyptic number.

656806223 is a deficient number, since it is larger than the sum of its proper divisors (1).

656806223 is an equidigital number, since it uses as much as digits as its factorization.

656806223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 656806223 is about 25628.2309767959. The cubic root of 656806223 is about 869.2521088377.

The spelling of 656806223 in words is "six hundred fifty-six million, eight hundred six thousand, two hundred twenty-three".