13920807 has 16 divisors (see below), whose sum is σ = 19844352. Its totient is φ = 8649600.

The previous prime is 13920799. The next prime is 13920811. The reversal of 13920807 is 70802931.

It is a happy number.

13920807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13920807 - 2³ = 13920799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4182 + ... + 6732.

It is an arithmetic number, because the mean of its divisors is an integer number (1240272).

Almost surely, 2^13920807 is an apocalyptic number.

13920807 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13920807 is a deficient number, since it is larger than the sum of its proper divisors (5923545).

13920807 is a wasteful number, since it uses less digits than its factorization.

13920807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 13920807 is about 3731.0597690201. The cubic root of 13920807 is about 240.5589230383.

The spelling of 13920807 in words is "thirteen million, nine hundred twenty thousand, eight hundred seven".