13879407 has 4 divisors (see below), whose sum is σ = 18505880. Its totient is φ = 9252936.

The previous prime is 13879387. The next prime is 13879409. The reversal of 13879407 is 70497831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70497831 = 3 ⋅23499277.

It is not a de Polignac number, because 13879407 - 2¹⁰ = 13878383 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 (13879409) 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, 2313232 + ... + 2313237.

It is an arithmetic number, because the mean of its divisors is an integer number (4626470).

Almost surely, 2^13879407 is an apocalyptic number.

13879407 is a deficient number, since it is larger than the sum of its proper divisors (4626473).

13879407 is an equidigital number, since it uses as much as digits as its factorization.

13879407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626472.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 13879407 is about 3725.5076164195. The cubic root of 13879407 is about 240.3202149311.

The spelling of 13879407 in words is "thirteen million, eight hundred seventy-nine thousand, four hundred seven".