72399899 has 16 divisors (see below), whose sum is σ = 89537280. Its totient is φ = 57555360.

The previous prime is 72399893. The next prime is 72399959. The reversal of 72399899 is 99899327.

It is a cyclic number.

It is not a de Polignac number, because 72399899 - 2²⁰ = 71351323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72399893) 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, 10607 + ... + 16040.

It is an arithmetic number, because the mean of its divisors is an integer number (5596080).

Almost surely, 2^72399899 is an apocalyptic number.

72399899 is a deficient number, since it is larger than the sum of its proper divisors (17137381).

72399899 is a wasteful number, since it uses less digits than its factorization.

72399899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26690.

The product of its digits is 2204496, while the sum is 56.

The square root of 72399899 is about 8508.8130194522. The cubic root of 72399899 is about 416.7855499348.

The spelling of 72399899 in words is "seventy-two million, three hundred ninety-nine thousand, eight hundred ninety-nine".