16989553 has 16 divisors (see below), whose sum is σ = 20608000. Its totient is φ = 13681872.

The previous prime is 16989547. The next prime is 16989569. The reversal of 16989553 is 35598961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16989553 is a prime.

It is a super-2 number, since 2×16989553² = 577289822279618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16989523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18028 + ... + 18946.

It is an arithmetic number, because the mean of its divisors is an integer number (1288000).

Almost surely, 2^16989553 is an apocalyptic number.

It is an amenable number.

16989553 is a deficient number, since it is larger than the sum of its proper divisors (3618447).

16989553 is a wasteful number, since it uses less digits than its factorization.

16989553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its digits is 291600, while the sum is 46.

The square root of 16989553 is about 4121.8385460860. The cubic root of 16989553 is about 257.0754773341.

The spelling of 16989553 in words is "sixteen million, nine hundred eighty-nine thousand, five hundred fifty-three".