13939513 has 4 divisors (see below), whose sum is σ = 15930880. Its totient is φ = 11948148.

The previous prime is 13939511. The next prime is 13939529. The reversal of 13939513 is 31593931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13939513 - 2¹ = 13939511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13939511) 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, 995673 + ... + 995686.

It is an arithmetic number, because the mean of its divisors is an integer number (3982720).

Almost surely, 2^13939513 is an apocalyptic number.

It is an amenable number.

13939513 is a deficient number, since it is larger than the sum of its proper divisors (1991367).

13939513 is an equidigital number, since it uses as much as digits as its factorization.

13939513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991366.

The product of its digits is 10935, while the sum is 34.

The square root of 13939513 is about 3733.5657219339. The cubic root of 13939513 is about 240.6666246763. Note that the first 4 decimals are identical.

The spelling of 13939513 in words is "thirteen million, nine hundred thirty-nine thousand, five hundred thirteen".