13976139 has 4 divisors (see below), whose sum is σ = 18634856. Its totient is φ = 9317424.

The previous prime is 13976101. The next prime is 13976143. The reversal of 13976139 is 93167931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93167931 = 3 ⋅31055977.

It is not a de Polignac number, because 13976139 - 2⁹ = 13975627 is a prime.

It is a super-2 number, since 2×13976139² = 390664922694642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13976097 and 13976106.

It is not an unprimeable number, because it can be changed into a prime (13976189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2329354 + ... + 2329359.

It is an arithmetic number, because the mean of its divisors is an integer number (4658714).

Almost surely, 2^13976139 is an apocalyptic number.

13976139 is a deficient number, since it is larger than the sum of its proper divisors (4658717).

13976139 is an equidigital number, since it uses as much as digits as its factorization.

13976139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658716.

The product of its digits is 30618, while the sum is 39.

The square root of 13976139 is about 3738.4674667569. The cubic root of 13976139 is about 240.8772237814.

The spelling of 13976139 in words is "thirteen million, nine hundred seventy-six thousand, one hundred thirty-nine".