13947986231 has 4 divisors (see below), whose sum is σ = 13948453464. Its totient is φ = 13947519000.

The previous prime is 13947986219. The next prime is 13947986249. The reversal of 13947986231 is 13268974931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13268974931 = 1667 ⋅7959793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13947986231 is a prime.

It is a super-2 number, since 2×13947986231² (a number of 21 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 (13947985231) 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, 185540 + ... + 249641.

It is an arithmetic number, because the mean of its divisors is an integer number (3487113366).

Almost surely, 2^13947986231 is an apocalyptic number.

13947986231 is a deficient number, since it is larger than the sum of its proper divisors (467233).

13947986231 is an equidigital number, since it uses as much as digits as its factorization.

13947986231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467232.

The product of its digits is 1959552, while the sum is 53.

The spelling of 13947986231 in words is "thirteen billion, nine hundred forty-seven million, nine hundred eighty-six thousand, two hundred thirty-one".