13920999 has 8 divisors (see below), whose sum is σ = 18630912. Its totient is φ = 9245880.

The previous prime is 13920997. The next prime is 13921001. The reversal of 13920999 is 99902931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13920997) and next prime (13921001).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13920999 - 2¹ = 13920997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13920999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920997) 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, 7749 + ... + 9374.

It is an arithmetic number, because the mean of its divisors is an integer number (2328864).

Almost surely, 2^13920999 is an apocalyptic number.

13920999 is a deficient number, since it is larger than the sum of its proper divisors (4709913).

13920999 is a wasteful number, since it uses less digits than its factorization.

13920999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17397.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 13920999 is about 3731.0854988863. The cubic root of 13920999 is about 240.5600289872.

The spelling of 13920999 in words is "thirteen million, nine hundred twenty thousand, nine hundred ninety-nine".