72989817 has 16 divisors (see below), whose sum is σ = 98841600. Its totient is φ = 47904912.

The previous prime is 72989809. The next prime is 72989831. The reversal of 72989817 is 71898927.

It is not a de Polignac number, because 72989817 - 2³ = 72989809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72989817.

It is not an unprimeable number, because it can be changed into a prime (72989117) 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, 60898 + ... + 62084.

It is an arithmetic number, because the mean of its divisors is an integer number (6177600).

Almost surely, 2^72989817 is an apocalyptic number.

It is an amenable number.

72989817 is a deficient number, since it is larger than the sum of its proper divisors (25851783).

72989817 is a wasteful number, since it uses less digits than its factorization.

72989817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492.

The product of its digits is 508032, while the sum is 51.

The square root of 72989817 is about 8543.4078095336. The cubic root of 72989817 is about 417.9144857614.

The spelling of 72989817 in words is "seventy-two million, nine hundred eighty-nine thousand, eight hundred seventeen".