72883621 has 4 divisors (see below), whose sum is σ = 72907200. Its totient is φ = 72860044.

The previous prime is 72883597. The next prime is 72883627. The reversal of 72883621 is 12638827.

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 72883621 - 2⁷ = 72883493 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 (72883627) 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, 6301 + ... + 13618.

It is an arithmetic number, because the mean of its divisors is an integer number (18226800).

Almost surely, 2^72883621 is an apocalyptic number.

It is an amenable number.

72883621 is a deficient number, since it is larger than the sum of its proper divisors (23579).

72883621 is a wasteful number, since it uses less digits than its factorization.

72883621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23578.

The product of its digits is 32256, while the sum is 37.

The square root of 72883621 is about 8537.1904629099. The cubic root of 72883621 is about 417.7117068449.

The spelling of 72883621 in words is "seventy-two million, eight hundred eighty-three thousand, six hundred twenty-one".