72752591 has 4 divisors (see below), whose sum is σ = 72786384. Its totient is φ = 72718800.

The previous prime is 72752587. The next prime is 72752597. The reversal of 72752591 is 19525727.

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

It is a cyclic number.

It is not a de Polignac number, because 72752591 - 2² = 72752587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72752597) 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, 13430 + ... + 18051.

It is an arithmetic number, because the mean of its divisors is an integer number (18196596).

Almost surely, 2^72752591 is an apocalyptic number.

72752591 is a deficient number, since it is larger than the sum of its proper divisors (33793).

72752591 is a wasteful number, since it uses less digits than its factorization.

72752591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33792.

The product of its digits is 44100, while the sum is 38.

The square root of 72752591 is about 8529.5129403736. The cubic root of 72752591 is about 417.4612363164.

The spelling of 72752591 in words is "seventy-two million, seven hundred fifty-two thousand, five hundred ninety-one".