16390917 has 10 divisors (see below), whose sum is σ = 24485318. Its totient is φ = 10927224.

The previous prime is 16390903. The next prime is 16390919. The reversal of 16390917 is 71909361.

16390917 is a `hidden beast` number, since 1 + 639 + 0 + 9 + 17 = 666.

16390917 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 4322241 = 3474^2 + 2079^2 .

It is not a de Polignac number, because 16390917 - 2¹⁵ = 16358149 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 (16390919) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 101098 + ... + 101259.

Almost surely, 2^16390917 is an apocalyptic number.

It is an amenable number.

16390917 is a deficient number, since it is larger than the sum of its proper divisors (8094401).

16390917 is an equidigital number, since it uses as much as digits as its factorization.

16390917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202369 (or 202360 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 16390917 is about 4048.5697474540. The cubic root of 16390917 is about 254.0199056465.

The spelling of 16390917 in words is "sixteen million, three hundred ninety thousand, nine hundred seventeen".