13399917 has 4 divisors (see below), whose sum is σ = 17866560. Its totient is φ = 8933276.

The previous prime is 13399889. The next prime is 13399949. The reversal of 13399917 is 71999331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71999331 = 3 ⋅23999777.

It is a cyclic number.

It is not a de Polignac number, because 13399917 - 2⁶ = 13399853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13399117) 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, 2233317 + ... + 2233322.

It is an arithmetic number, because the mean of its divisors is an integer number (4466640).

Almost surely, 2^13399917 is an apocalyptic number.

It is an amenable number.

13399917 is a deficient number, since it is larger than the sum of its proper divisors (4466643).

13399917 is an equidigital number, since it uses as much as digits as its factorization.

13399917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466642.

The product of its digits is 45927, while the sum is 42.

The square root of 13399917 is about 3660.5897065910. The cubic root of 13399917 is about 237.5202834016.

The spelling of 13399917 in words is "thirteen million, three hundred ninety-nine thousand, nine hundred seventeen".