13393913 has 8 divisors (see below), whose sum is σ = 14568456. Its totient is φ = 12241200.

The previous prime is 13393883. The next prime is 13393927. The reversal of 13393913 is 31939331.

It can be written as a sum of positive squares in 4 ways, for example, as 5345344 + 8048569 = 2312^2 + 2837^2 .

It is not a de Polignac number, because 13393913 - 2⁸ = 13393657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13393913.

It is not an unprimeable number, because it can be changed into a prime (13393973) 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, 132563 + ... + 132663.

It is an arithmetic number, because the mean of its divisors is an integer number (1821057).

Almost surely, 2^13393913 is an apocalyptic number.

13393913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13393913 is a deficient number, since it is larger than the sum of its proper divisors (1174543).

13393913 is an frugal number, since it uses more digits than its factorization.

13393913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 114 counting only the distinct ones).

The product of its digits is 6561, while the sum is 32.

The square root of 13393913 is about 3659.7695282627. The cubic root of 13393913 is about 237.4848034598.

The spelling of 13393913 in words is "thirteen million, three hundred ninety-three thousand, nine hundred thirteen".