16988425 has 6 divisors (see below), whose sum is σ = 21065678. Its totient is φ = 13590720.

The previous prime is 16988399. The next prime is 16988501. The reversal of 16988425 is 52488961.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 186624 + 16801801 = 432^2 + 4099^2 .

It is not a de Polignac number, because 16988425 - 2⁵ = 16988393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339744 + ... + 339793.

Almost surely, 2^16988425 is an apocalyptic number.

It is an amenable number.

16988425 is a deficient number, since it is larger than the sum of its proper divisors (4077253).

16988425 is an equidigital number, since it uses as much as digits as its factorization.

16988425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679547 (or 679542 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 16988425 is about 4121.7017116720. The cubic root of 16988425 is about 257.0697878072.

The spelling of 16988425 in words is "sixteen million, nine hundred eighty-eight thousand, four hundred twenty-five".