13979087896391 has 8 divisors (see below), whose sum is σ = 15009857427744. Its totient is φ = 12971481725440.

The previous prime is 13979087896373. The next prime is 13979087896441. The reversal of 13979087896391 is 19369878097931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13979087896391 - 2⁶ = 13979087896327 is a prime.

It is a super-3 number, since 3×13979087896391³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13979087896331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5790838850 + ... + 5790841263.

It is an arithmetic number, because the mean of its divisors is an integer number (1876232178468).

Almost surely, 2^{13979087896391} is an apocalyptic number.

13979087896391 is a deficient number, since it is larger than the sum of its proper divisors (1030769531353).

13979087896391 is a wasteful number, since it uses less digits than its factorization.

13979087896391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581680201.

The product of its (nonzero) digits is 1111065984, while the sum is 80.

The spelling of 13979087896391 in words is "thirteen trillion, nine hundred seventy-nine billion, eighty-seven million, eight hundred ninety-six thousand, three hundred ninety-one".