13387863491 has 2 divisors, whose sum is σ = 13387863492. Its totient is φ = 13387863490.

The previous prime is 13387863469. The next prime is 13387863493. The reversal of 13387863491 is 19436878331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13387863491 - 2¹⁸ = 13387601347 is a prime.

Together with 13387863493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13387863493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6693931745 + 6693931746.

It is an arithmetic number, because the mean of its divisors is an integer number (6693931746).

Almost surely, 2^13387863491 is an apocalyptic number.

13387863491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13387863491 is an equidigital number, since it uses as much as digits as its factorization.

13387863491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 53.

The spelling of 13387863491 in words is "thirteen billion, three hundred eighty-seven million, eight hundred sixty-three thousand, four hundred ninety-one".