72499031 has 8 divisors (see below), whose sum is σ = 79177728. Its totient is φ = 65835000.

The previous prime is 72499019. The next prime is 72499073. The reversal of 72499031 is 13099427.

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

It is not a de Polignac number, because 72499031 - 2¹⁴ = 72482647 is a prime.

It is a super-2 number, since 2×72499031² = 10512218991877922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72498982 and 72499000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72499081) 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, 8426 + ... + 14696.

It is an arithmetic number, because the mean of its divisors is an integer number (9897216).

Almost surely, 2^72499031 is an apocalyptic number.

72499031 is a deficient number, since it is larger than the sum of its proper divisors (6678697).

72499031 is a wasteful number, since it uses less digits than its factorization.

72499031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 72499031 is about 8514.6362811338. The cubic root of 72499031 is about 416.9756880550.

The spelling of 72499031 in words is "seventy-two million, four hundred ninety-nine thousand, thirty-one".