13971439711 has 4 divisors (see below), whose sum is σ = 14168220624. Its totient is φ = 13774658800.

The previous prime is 13971439673. The next prime is 13971439753. The reversal of 13971439711 is 11793417931.

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 13971439711 - 2⁹ = 13971439199 is a prime.

It is a super-2 number, since 2×13971439711² (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 (13971439411) 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, 98390350 + ... + 98390491.

It is an arithmetic number, because the mean of its divisors is an integer number (3542055156).

Almost surely, 2^13971439711 is an apocalyptic number.

13971439711 is a deficient number, since it is larger than the sum of its proper divisors (196780913).

13971439711 is an equidigital number, since it uses as much as digits as its factorization.

13971439711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196780912.

The product of its digits is 142884, while the sum is 46.

The spelling of 13971439711 in words is "thirteen billion, nine hundred seventy-one million, four hundred thirty-nine thousand, seven hundred eleven".