16956989 has 24 divisors (see below), whose sum is σ = 20793600. Its totient is φ = 13771296.

The previous prime is 16956977. The next prime is 16957009. The reversal of 16956989 is 98965961.

It is not a de Polignac number, because 16956989 - 2⁸ = 16956733 is a prime.

It is a super-2 number, since 2×16956989² = 575078951892242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16956989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16956959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85112 + ... + 85310.

It is an arithmetic number, because the mean of its divisors is an integer number (866400).

Almost surely, 2^16956989 is an apocalyptic number.

It is an amenable number.

16956989 is a deficient number, since it is larger than the sum of its proper divisors (3836611).

16956989 is a wasteful number, since it uses less digits than its factorization.

16956989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 290 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 53.

The square root of 16956989 is about 4117.8864724516. The cubic root of 16956989 is about 256.9111261382.

The spelling of 16956989 in words is "sixteen million, nine hundred fifty-six thousand, nine hundred eighty-nine".