72856583 has 4 divisors (see below), whose sum is σ = 76691160. Its totient is φ = 69022008.

The previous prime is 72856561. The next prime is 72856607. The reversal of 72856583 is 38565827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38565827 = 73 ⋅528299.

It is a cyclic number.

It is not a de Polignac number, because 72856583 - 2¹² = 72852487 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 (72856513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1917260 + ... + 1917297.

It is an arithmetic number, because the mean of its divisors is an integer number (19172790).

Almost surely, 2^72856583 is an apocalyptic number.

72856583 is a deficient number, since it is larger than the sum of its proper divisors (3834577).

72856583 is a wasteful number, since it uses less digits than its factorization.

72856583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834576.

The product of its digits is 403200, while the sum is 44.

The square root of 72856583 is about 8535.6067739792. The cubic root of 72856583 is about 417.6600469252.

The spelling of 72856583 in words is "seventy-two million, eight hundred fifty-six thousand, five hundred eighty-three".