13279825991 has 2 divisors, whose sum is σ = 13279825992. Its totient is φ = 13279825990.

The previous prime is 13279825987. The next prime is 13279826033. The reversal of 13279825991 is 19952897231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13279825991 - 2² = 13279825987 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13279825901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6639912995 + 6639912996.

It is an arithmetic number, because the mean of its divisors is an integer number (6639912996).

Almost surely, 2^13279825991 is an apocalyptic number.

13279825991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13279825991 is an equidigital number, since it uses as much as digits as its factorization.

13279825991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 56.

The spelling of 13279825991 in words is "thirteen billion, two hundred seventy-nine million, eight hundred twenty-five thousand, nine hundred ninety-one".