3951397393117 has 2 divisors, whose sum is σ = 3951397393118. Its totient is φ = 3951397393116.

The previous prime is 3951397393079. The next prime is 3951397393129. The reversal of 3951397393117 is 7113937931593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3851932217956 + 99465175161 = 1962634^2 + 315381^2 .

It is a cyclic number.

It is not a de Polignac number, because 3951397393117 - 2²⁷ = 3951263175389 is a prime.

It is a super-2 number, since 2×3951397393117² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3951397393187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975698696558 + 1975698696559.

It is an arithmetic number, because the mean of its divisors is an integer number (1975698696559).

Almost surely, 2^{3951397393117} is an apocalyptic number.

It is an amenable number.

3951397393117 is a deficient number, since it is larger than the sum of its proper divisors (1).

3951397393117 is an equidigital number, since it uses as much as digits as its factorization.

3951397393117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14467005, while the sum is 61.

The spelling of 3951397393117 in words is "three trillion, nine hundred fifty-one billion, three hundred ninety-seven million, three hundred ninety-three thousand, one hundred seventeen".