72816959 has 8 divisors (see below), whose sum is σ = 74513088. Its totient is φ = 71127040.

The previous prime is 72816937. The next prime is 72816973. The reversal of 72816959 is 95961827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72816959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72816659) 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, 28919 + ... + 31335.

It is an arithmetic number, because the mean of its divisors is an integer number (9314136).

Almost surely, 2^72816959 is an apocalyptic number.

72816959 is a deficient number, since it is larger than the sum of its proper divisors (1696129).

72816959 is a wasteful number, since it uses less digits than its factorization.

72816959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105.

The product of its digits is 272160, while the sum is 47.

The square root of 72816959 is about 8533.2853579381. The cubic root of 72816959 is about 417.5843165789.

The spelling of 72816959 in words is "seventy-two million, eight hundred sixteen thousand, nine hundred fifty-nine".