72999031 has 8 divisors (see below), whose sum is σ = 83496960. Its totient is φ = 62518488.

The previous prime is 72999029. The next prime is 72999041. The reversal of 72999031 is 13099927.

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

It is a cyclic number.

It is not a de Polignac number, because 72999031 - 2¹ = 72999029 is a prime.

It is a super-2 number, since 2×72999031² = 10657717053877922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72999041) 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, 6450 + ... + 13696.

It is an arithmetic number, because the mean of its divisors is an integer number (10437120).

Almost surely, 2^72999031 is an apocalyptic number.

72999031 is a deficient number, since it is larger than the sum of its proper divisors (10497929).

72999031 is a wasteful number, since it uses less digits than its factorization.

72999031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8693.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 72999031 is about 8543.9470386935. The cubic root of 72999031 is about 417.9320704155.

The spelling of 72999031 in words is "seventy-two million, nine hundred ninety-nine thousand, thirty-one".