13231671977 has 2 divisors, whose sum is σ = 13231671978. Its totient is φ = 13231671976.

The previous prime is 13231671961. The next prime is 13231671989. The reversal of 13231671977 is 77917613231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12141615721 + 1090056256 = 110189^2 + 33016^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231671977 - 2⁴ = 13231671961 is a prime.

It is not a weakly prime, because it can be changed into another prime (13231671997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615835988 + 6615835989.

It is an arithmetic number, because the mean of its divisors is an integer number (6615835989).

Almost surely, 2^13231671977 is an apocalyptic number.

It is an amenable number.

13231671977 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231671977 is an equidigital number, since it uses as much as digits as its factorization.

13231671977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 333396, while the sum is 47.

The spelling of 13231671977 in words is "thirteen billion, two hundred thirty-one million, six hundred seventy-one thousand, nine hundred seventy-seven".