13919871 has 12 divisors (see below), whose sum is σ = 21590232. Its totient is φ = 7954128.

The previous prime is 13919861. The next prime is 13919887. The reversal of 13919871 is 17891931.

It is not a de Polignac number, because 13919871 - 2⁵ = 13919839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13919861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47200 + ... + 47493.

It is an arithmetic number, because the mean of its divisors is an integer number (1799186).

Almost surely, 2^13919871 is an apocalyptic number.

13919871 is a deficient number, since it is larger than the sum of its proper divisors (7670361).

13919871 is an equidigital number, since it uses as much as digits as its factorization.

13919871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94710 (or 94703 counting only the distinct ones).

The product of its digits is 13608, while the sum is 39.

The square root of 13919871 is about 3730.9343333808. The cubic root of 13919871 is about 240.5535313921.

The spelling of 13919871 in words is "thirteen million, nine hundred nineteen thousand, eight hundred seventy-one".