13387437391 has 4 divisors (see below), whose sum is σ = 13389144400. Its totient is φ = 13385730384.

The previous prime is 13387437353. The next prime is 13387437409. The reversal of 13387437391 is 19373478331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13387437391 - 2¹⁹ = 13386913103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13387437191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841686 + ... + 857443.

It is an arithmetic number, because the mean of its divisors is an integer number (3347286100).

Almost surely, 2^13387437391 is an apocalyptic number.

13387437391 is a deficient number, since it is larger than the sum of its proper divisors (1707009).

13387437391 is an equidigital number, since it uses as much as digits as its factorization.

13387437391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707008.

The product of its digits is 1143072, while the sum is 49.

The spelling of 13387437391 in words is "thirteen billion, three hundred eighty-seven million, four hundred thirty-seven thousand, three hundred ninety-one".