16917489 has 12 divisors (see below), whose sum is σ = 25499136. Its totient is φ = 10787832.

The previous prime is 16917487. The next prime is 16917503. The reversal of 16917489 is 98471961.

It is a happy number.

16917489 is a `hidden beast` number, since 169 + 1 + 7 + 489 = 666.

It is not a de Polignac number, because 16917489 - 2¹ = 16917487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16917487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40657 + ... + 41070.

It is an arithmetic number, because the mean of its divisors is an integer number (2124928).

Almost surely, 2^16917489 is an apocalyptic number.

It is an amenable number.

16917489 is a deficient number, since it is larger than the sum of its proper divisors (8581647).

16917489 is a wasteful number, since it uses less digits than its factorization.

16917489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81756 (or 81753 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 16917489 is about 4113.0875264210. The cubic root of 16917489 is about 256.7114861481.

It can be divided in two parts, 1691 and 7489, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 16917489 in words is "sixteen million, nine hundred seventeen thousand, four hundred eighty-nine".