13171977953 has 2 divisors, whose sum is σ = 13171977954. Its totient is φ = 13171977952.

The previous prime is 13171977947. The next prime is 13171977983. The reversal of 13171977953 is 35977917131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12801338449 + 370639504 = 113143^2 + 19252^2 .

It is a cyclic number.

It is not a de Polignac number, because 13171977953 - 2⁸ = 13171977697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13171977895 and 13171977904.

It is not a weakly prime, because it can be changed into another prime (13171977913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6585988976 + 6585988977.

It is an arithmetic number, because the mean of its divisors is an integer number (6585988977).

Almost surely, 2^13171977953 is an apocalyptic number.

It is an amenable number.

13171977953 is a deficient number, since it is larger than the sum of its proper divisors (1).

13171977953 is an equidigital number, since it uses as much as digits as its factorization.

13171977953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1250235, while the sum is 53.

The spelling of 13171977953 in words is "thirteen billion, one hundred seventy-one million, nine hundred seventy-seven thousand, nine hundred fifty-three".