13920917 has 4 divisors (see below), whose sum is σ = 14297196. Its totient is φ = 13544640.

The previous prime is 13920913. The next prime is 13920923. The reversal of 13920917 is 71902931.

It is a happy number.

13920917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71902931 = 227 ⋅316753.

It can be written as a sum of positive squares in 2 ways, for example, as 11771761 + 2149156 = 3431^2 + 1466^2 .

It is a cyclic number.

It is not a de Polignac number, because 13920917 - 2² = 13920913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920913) 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, 188084 + ... + 188157.

It is an arithmetic number, because the mean of its divisors is an integer number (3574299).

Almost surely, 2^13920917 is an apocalyptic number.

It is an amenable number.

13920917 is a deficient number, since it is larger than the sum of its proper divisors (376279).

13920917 is an equidigital number, since it uses as much as digits as its factorization.

13920917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376278.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 13920917 is about 3731.0745101110. The cubic root of 13920917 is about 240.5595566561.

The spelling of 13920917 in words is "thirteen million, nine hundred twenty thousand, nine hundred seventeen".