16972989 has 8 divisors (see below), whose sum is σ = 24688032. Its totient is φ = 10286640.

The previous prime is 16972979. The next prime is 16972993. The reversal of 16972989 is 98927961.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16972989 - 2⁵ = 16972957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16972979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257134 + ... + 257199.

It is an arithmetic number, because the mean of its divisors is an integer number (3086004).

Almost surely, 2^16972989 is an apocalyptic number.

It is an amenable number.

16972989 is a deficient number, since it is larger than the sum of its proper divisors (7715043).

16972989 is a wasteful number, since it uses less digits than its factorization.

16972989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514347.

The product of its digits is 489888, while the sum is 51.

The square root of 16972989 is about 4119.8287585772. The cubic root of 16972989 is about 256.9919047448.

The spelling of 16972989 in words is "sixteen million, nine hundred seventy-two thousand, nine hundred eighty-nine".