13388891497 has 4 divisors (see below), whose sum is σ = 13390308736. Its totient is φ = 13387474260.

The previous prime is 13388891471. The next prime is 13388891513. The reversal of 13388891497 is 79419888331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13388891497 - 2²⁷ = 13254673769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13388891597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694353 + ... + 713374.

It is an arithmetic number, because the mean of its divisors is an integer number (3347577184).

Almost surely, 2^13388891497 is an apocalyptic number.

It is an amenable number.

13388891497 is a deficient number, since it is larger than the sum of its proper divisors (1417239).

13388891497 is an equidigital number, since it uses as much as digits as its factorization.

13388891497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417238.

The product of its digits is 10450944, while the sum is 61.

The spelling of 13388891497 in words is "thirteen billion, three hundred eighty-eight million, eight hundred ninety-one thousand, four hundred ninety-seven".