13420879 has 4 divisors (see below), whose sum is σ = 13436584. Its totient is φ = 13405176.

The previous prime is 13420873. The next prime is 13420943. The reversal of 13420879 is 97802431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13420879 - 2²¹ = 11323727 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 (13420873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6492 + ... + 8305.

It is an arithmetic number, because the mean of its divisors is an integer number (3359146).

Almost surely, 2^13420879 is an apocalyptic number.

13420879 is a deficient number, since it is larger than the sum of its proper divisors (15705).

13420879 is an equidigital number, since it uses as much as digits as its factorization.

13420879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15704.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 13420879 is about 3663.4517875905. The cubic root of 13420879 is about 237.6440728799.

The spelling of 13420879 in words is "thirteen million, four hundred twenty thousand, eight hundred seventy-nine".