13739409 has 8 divisors (see below), whose sum is σ = 20354720. Its totient is φ = 9159588.

The previous prime is 13739399. The next prime is 13739419. The reversal of 13739409 is 90493731.

It is an interprime number because it is at equal distance from previous prime (13739399) and next prime (13739419).

It is not a de Polignac number, because 13739409 - 2⁵ = 13739377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13739419) 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 7 ways as a sum of consecutive naturals, for example, 254407 + ... + 254460.

It is an arithmetic number, because the mean of its divisors is an integer number (2544340).

Almost surely, 2^13739409 is an apocalyptic number.

It is an amenable number.

13739409 is a deficient number, since it is larger than the sum of its proper divisors (6615311).

13739409 is an equidigital number, since it uses as much as digits as its factorization.

13739409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508876 (or 508870 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 13739409 is about 3706.6708782950. The cubic root of 13739409 is about 239.5094668381.

The spelling of 13739409 in words is "thirteen million, seven hundred thirty-nine thousand, four hundred nine".