13779235391 has 2 divisors, whose sum is σ = 13779235392. Its totient is φ = 13779235390.

The previous prime is 13779235331. The next prime is 13779235399. The reversal of 13779235391 is 19353297731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13779235391 - 2²² = 13775041087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13779235399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6889617695 + 6889617696.

It is an arithmetic number, because the mean of its divisors is an integer number (6889617696).

Almost surely, 2^13779235391 is an apocalyptic number.

13779235391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13779235391 is an equidigital number, since it uses as much as digits as its factorization.

13779235391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1071630, while the sum is 50.

The spelling of 13779235391 in words is "thirteen billion, seven hundred seventy-nine million, two hundred thirty-five thousand, three hundred ninety-one".