6312981617 has 2 divisors, whose sum is σ = 6312981618. Its totient is φ = 6312981616.

The previous prime is 6312981589. The next prime is 6312981641. The reversal of 6312981617 is 7161892136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4351908961 + 1961072656 = 65969^2 + 44284^2 .

It is a cyclic number.

It is not a de Polignac number, because 6312981617 - 2²² = 6308787313 is a prime.

It is not a weakly prime, because it can be changed into another prime (6312981817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3156490808 + 3156490809.

It is an arithmetic number, because the mean of its divisors is an integer number (3156490809).

Almost surely, 2^6312981617 is an apocalyptic number.

It is an amenable number.

6312981617 is a deficient number, since it is larger than the sum of its proper divisors (1).

6312981617 is an equidigital number, since it uses as much as digits as its factorization.

6312981617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 6312981617 is about 79454.2737491194. The cubic root of 6312981617 is about 1848.1824483675.

The spelling of 6312981617 in words is "six billion, three hundred twelve million, nine hundred eighty-one thousand, six hundred seventeen".