13391913 has 4 divisors (see below), whose sum is σ = 17855888. Its totient is φ = 8927940.

The previous prime is 13391909. The next prime is 13391927. The reversal of 13391913 is 31919331.

It is a happy number.

13391913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 13391913 - 2² = 13391909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13391933) 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, 2231983 + ... + 2231988.

It is an arithmetic number, because the mean of its divisors is an integer number (4463972).

Almost surely, 2^13391913 is an apocalyptic number.

It is an amenable number.

13391913 is a deficient number, since it is larger than the sum of its proper divisors (4463975).

13391913 is an equidigital number, since it uses as much as digits as its factorization.

13391913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463974.

The product of its digits is 2187, while the sum is 30.

The square root of 13391913 is about 3659.4962768119. The cubic root of 13391913 is about 237.4729823375.

The spelling of 13391913 in words is "thirteen million, three hundred ninety-one thousand, nine hundred thirteen".