13389993 has 6 divisors (see below), whose sum is σ = 19341114. Its totient is φ = 8926656.

The previous prime is 13389953. The next prime is 13389997. The reversal of 13389993 is 39998331.

It can be written as a sum of positive squares in only one way, i.e., 12938409 + 451584 = 3597^2 + 672^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13389993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13389997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 743880 + ... + 743897.

It is an arithmetic number, because the mean of its divisors is an integer number (3223519).

Almost surely, 2^13389993 is an apocalyptic number.

It is an amenable number.

13389993 is a deficient number, since it is larger than the sum of its proper divisors (5951121).

13389993 is a wasteful number, since it uses less digits than its factorization.

13389993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487783 (or 1487780 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 13389993 is about 3659.2339362222. The cubic root of 13389993 is about 237.4616329528.

The spelling of 13389993 in words is "thirteen million, three hundred eighty-nine thousand, nine hundred ninety-three".