16959987 has 24 divisors (see below), whose sum is σ = 26914368. Its totient is φ = 10206000.

The previous prime is 16959979. The next prime is 16959991. The reversal of 16959987 is 78995961.

It is not a de Polignac number, because 16959987 - 2³ = 16959979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16957987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15612 + ... + 16662.

It is an arithmetic number, because the mean of its divisors is an integer number (1121432).

Almost surely, 2^16959987 is an apocalyptic number.

16959987 is a deficient number, since it is larger than the sum of its proper divisors (9954381).

16959987 is a wasteful number, since it uses less digits than its factorization.

16959987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231 (or 1228 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 16959987 is about 4118.2504780550. The cubic root of 16959987 is about 256.9262658970.

The spelling of 16959987 in words is "sixteen million, nine hundred fifty-nine thousand, nine hundred eighty-seven".