16887969 has 12 divisors (see below), whose sum is σ = 27878656. Its totient is φ = 9650232.

The previous prime is 16887967. The next prime is 16887971. The reversal of 16887969 is 96978861.

It is an interprime number because it is at equal distance from previous prime (16887967) and next prime (16887971).

It is not a de Polignac number, because 16887969 - 2¹ = 16887967 is a prime.

It is a super-2 number, since 2×16887969² = 570406993889922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16887961) 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, 133969 + ... + 134094.

Almost surely, 2^16887969 is an apocalyptic number.

It is an amenable number.

16887969 is a deficient number, since it is larger than the sum of its proper divisors (10990687).

16887969 is a wasteful number, since it uses less digits than its factorization.

16887969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268076 (or 268073 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 16887969 is about 4109.4974145265. The cubic root of 16887969 is about 256.5620838513.

The spelling of 16887969 in words is "sixteen million, eight hundred eighty-seven thousand, nine hundred sixty-nine".