722474621 has 4 divisors (see below), whose sum is σ = 788154144. Its totient is φ = 656795100.

The previous prime is 722474603. The next prime is 722474659. The reversal of 722474621 is 126474227.

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 722474621 - 2²⁶ = 655365757 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 (722474681) 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, 32839745 + ... + 32839766.

It is an arithmetic number, because the mean of its divisors is an integer number (197038536).

Almost surely, 2^722474621 is an apocalyptic number.

It is an amenable number.

722474621 is a deficient number, since it is larger than the sum of its proper divisors (65679523).

722474621 is a wasteful number, since it uses less digits than its factorization.

722474621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65679522.

The product of its digits is 37632, while the sum is 35.

The square root of 722474621 is about 26878.8880164340. Note that the first 3 decimals coincide. The cubic root of 722474621 is about 897.3066064788.

The spelling of 722474621 in words is "seven hundred twenty-two million, four hundred seventy-four thousand, six hundred twenty-one".