13929871893431 has 8 divisors (see below), whose sum is σ = 15001468406400. Its totient is φ = 12858285081312.

The previous prime is 13929871893401. The next prime is 13929871893463. The reversal of 13929871893431 is 13439817892931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13929871893431 is a prime.

It is a super-2 number, since 2×13929871893431² (a number of 27 digits) contains 22 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 (13929871893401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706970 + ... + 5325368.

It is an arithmetic number, because the mean of its divisors is an integer number (1875183550800).

Almost surely, 2^{13929871893431} is an apocalyptic number.

13929871893431 is a deficient number, since it is larger than the sum of its proper divisors (1071596512969).

13929871893431 is a wasteful number, since it uses less digits than its factorization.

13929871893431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850425.

The product of its digits is 70543872, while the sum is 68.

The spelling of 13929871893431 in words is "thirteen trillion, nine hundred twenty-nine billion, eight hundred seventy-one million, eight hundred ninety-three thousand, four hundred thirty-one".