13957107961 has 2 divisors, whose sum is σ = 13957107962. Its totient is φ = 13957107960.

The previous prime is 13957107949. The next prime is 13957107971. The reversal of 13957107961 is 16970175931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8299210000 + 5657897961 = 91100^2 + 75219^2 .

It is a cyclic number.

It is not a de Polignac number, because 13957107961 - 2⁵ = 13957107929 is a prime.

It is not a weakly prime, because it can be changed into another prime (13957107971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6978553980 + 6978553981.

It is an arithmetic number, because the mean of its divisors is an integer number (6978553981).

Almost surely, 2^13957107961 is an apocalyptic number.

It is an amenable number.

13957107961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13957107961 is an equidigital number, since it uses as much as digits as its factorization.

13957107961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 49.

The spelling of 13957107961 in words is "thirteen billion, nine hundred fifty-seven million, one hundred seven thousand, nine hundred sixty-one".