72933581 has 4 divisors (see below), whose sum is σ = 83352672. Its totient is φ = 62514492.

The previous prime is 72933577. The next prime is 72933583. The reversal of 72933581 is 18533927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72933581 - 2² = 72933577 is a prime.

It is a super-2 number, since 2×72933581² = 10638614474967122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72933583) 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, 5209535 + ... + 5209548.

It is an arithmetic number, because the mean of its divisors is an integer number (20838168).

Almost surely, 2^72933581 is an apocalyptic number.

It is an amenable number.

72933581 is a deficient number, since it is larger than the sum of its proper divisors (10419091).

72933581 is a wasteful number, since it uses less digits than its factorization.

72933581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10419090.

The product of its digits is 45360, while the sum is 38.

The square root of 72933581 is about 8540.1159828190. The cubic root of 72933581 is about 417.8071288800.

The spelling of 72933581 in words is "seventy-two million, nine hundred thirty-three thousand, five hundred eighty-one".