13878279 has 6 divisors (see below), whose sum is σ = 20046416. Its totient is φ = 9252180.

The previous prime is 13878229. The next prime is 13878281. The reversal of 13878279 is 97287831.

It is not a de Polignac number, because 13878279 - 2⁸ = 13878023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878229) 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 5 ways as a sum of consecutive naturals, for example, 771007 + ... + 771024.

Almost surely, 2^13878279 is an apocalyptic number.

13878279 is a deficient number, since it is larger than the sum of its proper divisors (6168137).

13878279 is a wasteful number, since it uses less digits than its factorization.

13878279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542037 (or 1542034 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 13878279 is about 3725.3562245777. The cubic root of 13878279 is about 240.3137043612.

The spelling of 13878279 in words is "thirteen million, eight hundred seventy-eight thousand, two hundred seventy-nine".