72513789 has 16 divisors (see below), whose sum is σ = 104872320. Its totient is φ = 44387840.

The previous prime is 72513769. The next prime is 72513797. The reversal of 72513789 is 98731527.

It is a cyclic number.

It is not a de Polignac number, because 72513789 - 2⁵ = 72513757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72513789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72513719) 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, 15249 + ... + 19430.

It is an arithmetic number, because the mean of its divisors is an integer number (6554520).

Almost surely, 2^72513789 is an apocalyptic number.

It is an amenable number.

72513789 is a deficient number, since it is larger than the sum of its proper divisors (32358531).

72513789 is a wasteful number, since it uses less digits than its factorization.

72513789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34740.

The product of its digits is 105840, while the sum is 42.

The square root of 72513789 is about 8515.5028624269. The cubic root of 72513789 is about 417.0039795122.

The spelling of 72513789 in words is "seventy-two million, five hundred thirteen thousand, seven hundred eighty-nine".