656468213 has 2 divisors, whose sum is σ = 656468214. Its totient is φ = 656468212.

The previous prime is 656468191. The next prime is 656468233. The reversal of 656468213 is 312864656.

656468213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 564442564 + 92025649 = 23758^2 + 9593^2 .

It is a cyclic number.

It is not a de Polignac number, because 656468213 - 2⁸ = 656467957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656468233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328234106 + 328234107.

It is an arithmetic number, because the mean of its divisors is an integer number (328234107).

Almost surely, 2^656468213 is an apocalyptic number.

It is an amenable number.

656468213 is a deficient number, since it is larger than the sum of its proper divisors (1).

656468213 is an equidigital number, since it uses as much as digits as its factorization.

656468213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The square root of 656468213 is about 25621.6356425580. The cubic root of 656468213 is about 869.1029698115.

The spelling of 656468213 in words is "six hundred fifty-six million, four hundred sixty-eight thousand, two hundred thirteen".