72589865 has 4 divisors (see below), whose sum is σ = 87107844. Its totient is φ = 58071888.

The previous prime is 72589859. The next prime is 72589873. The reversal of 72589865 is 56898527.

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 46895104 + 25694761 = 6848^2 + 5069^2 .

It is a cyclic number.

It is not a de Polignac number, because 72589865 - 2¹⁸ = 72327721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7258982 + ... + 7258991.

It is an arithmetic number, because the mean of its divisors is an integer number (21776961).

Almost surely, 2^72589865 is an apocalyptic number.

It is an amenable number.

72589865 is a deficient number, since it is larger than the sum of its proper divisors (14517979).

72589865 is a wasteful number, since it uses less digits than its factorization.

72589865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14517978.

The product of its digits is 1209600, while the sum is 50.

The square root of 72589865 is about 8519.9686032285. The cubic root of 72589865 is about 417.1497582554.

The spelling of 72589865 in words is "seventy-two million, five hundred eighty-nine thousand, eight hundred sixty-five".