656100013 has 2 divisors, whose sum is σ = 656100014. Its totient is φ = 656100012.

The previous prime is 656099993. The next prime is 656100019. The reversal of 656100013 is 310001656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 617124964 + 38975049 = 24842^2 + 6243^2 .

It is a cyclic number.

It is not a de Polignac number, because 656100013 - 2⁵ = 656099981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656100019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328050006 + 328050007.

It is an arithmetic number, because the mean of its divisors is an integer number (328050007).

Almost surely, 2^656100013 is an apocalyptic number.

It is an amenable number.

656100013 is a deficient number, since it is larger than the sum of its proper divisors (1).

656100013 is an equidigital number, since it uses as much as digits as its factorization.

656100013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 656100013 is about 25614.4493011269. The cubic root of 656100013 is about 868.9404518841.

Adding to 656100013 its reverse (310001656), we get a palindrome (966101669).

The spelling of 656100013 in words is "six hundred fifty-six million, one hundred thousand, thirteen".