13403312591 has 2 divisors, whose sum is σ = 13403312592. Its totient is φ = 13403312590.

The previous prime is 13403312579. The next prime is 13403312609. The reversal of 13403312591 is 19521330431.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13403312591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13403311591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6701656295 + 6701656296.

It is an arithmetic number, because the mean of its divisors is an integer number (6701656296).

Almost surely, 2^13403312591 is an apocalyptic number.

13403312591 is a deficient number, since it is larger than the sum of its proper divisors (1).

13403312591 is an equidigital number, since it uses as much as digits as its factorization.

13403312591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The spelling of 13403312591 in words is "thirteen billion, four hundred three million, three hundred twelve thousand, five hundred ninety-one".