13387313 has 4 divisors (see below), whose sum is σ = 14174820. Its totient is φ = 12599808.

The previous prime is 13387301. The next prime is 13387331. The reversal of 13387313 is 31378331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5276209 + 8111104 = 2297^2 + 2848^2 .

It is a cyclic number.

It is not a de Polignac number, because 13387313 - 2⁶ = 13387249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13387333) 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, 393728 + ... + 393761.

It is an arithmetic number, because the mean of its divisors is an integer number (3543705).

Almost surely, 2^13387313 is an apocalyptic number.

It is an amenable number.

13387313 is a deficient number, since it is larger than the sum of its proper divisors (787507).

13387313 is an equidigital number, since it uses as much as digits as its factorization.

13387313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787506.

The product of its digits is 4536, while the sum is 29.

The square root of 13387313 is about 3658.8677210306. The cubic root of 13387313 is about 237.4457892891.

The spelling of 13387313 in words is "thirteen million, three hundred eighty-seven thousand, three hundred thirteen".