13917879 has 8 divisors (see below), whose sum is σ = 20619120. Its totient is φ = 9278568.

The previous prime is 13917877. The next prime is 13917881. The reversal of 13917879 is 97871931.

It is an interprime number because it is at equal distance from previous prime (13917877) and next prime (13917881).

It is not a de Polignac number, because 13917879 - 2¹ = 13917877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13917877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257712 + ... + 257765.

It is an arithmetic number, because the mean of its divisors is an integer number (2577390).

Almost surely, 2^13917879 is an apocalyptic number.

13917879 is a deficient number, since it is larger than the sum of its proper divisors (6701241).

13917879 is an equidigital number, since it uses as much as digits as its factorization.

13917879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515486 (or 515480 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 13917879 is about 3730.6673665713. The cubic root of 13917879 is about 240.5420560584.

The spelling of 13917879 in words is "thirteen million, nine hundred seventeen thousand, eight hundred seventy-nine".