72499633 has 4 divisors (see below), whose sum is σ = 72566820. Its totient is φ = 72432448.

The previous prime is 72499631. The next prime is 72499663. The reversal of 72499633 is 33699427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18079504 + 54420129 = 4252^2 + 7377^2 .

It is a cyclic number.

It is not a de Polignac number, because 72499633 - 2¹ = 72499631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72499633.

It is not an unprimeable number, because it can be changed into a prime (72499631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31948 + ... + 34141.

It is an arithmetic number, because the mean of its divisors is an integer number (18141705).

Almost surely, 2^72499633 is an apocalyptic number.

It is an amenable number.

72499633 is a deficient number, since it is larger than the sum of its proper divisors (67187).

72499633 is a wasteful number, since it uses less digits than its factorization.

72499633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67186.

The product of its digits is 244944, while the sum is 43.

The square root of 72499633 is about 8514.6716319539. The cubic root of 72499633 is about 416.9768421792.

The spelling of 72499633 in words is "seventy-two million, four hundred ninety-nine thousand, six hundred thirty-three".