13817965 has 16 divisors (see below), whose sum is σ = 19139328. Its totient is φ = 9380736.

The previous prime is 13817933. The next prime is 13817987. The reversal of 13817965 is 56971831.

It is a cyclic number.

It is not a de Polignac number, because 13817965 - 2⁵ = 13817933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1689 + ... + 5521.

It is an arithmetic number, because the mean of its divisors is an integer number (1196208).

Almost surely, 2^13817965 is an apocalyptic number.

It is an amenable number.

13817965 is a deficient number, since it is larger than the sum of its proper divisors (5321363).

13817965 is a wasteful number, since it uses less digits than its factorization.

13817965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948.

The product of its digits is 45360, while the sum is 40.

The square root of 13817965 is about 3717.2523454832. The cubic root of 13817965 is about 239.9650701480.

The spelling of 13817965 in words is "thirteen million, eight hundred seventeen thousand, nine hundred sixty-five".