652683621 has 4 divisors (see below), whose sum is σ = 870244832. Its totient is φ = 435122412.

The previous prime is 652683613. The next prime is 652683631. The reversal of 652683621 is 126386256.

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 not a de Polignac number, because 652683621 - 2³ = 652683613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 652683621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652683631) 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, 108780601 + ... + 108780606.

It is an arithmetic number, because the mean of its divisors is an integer number (217561208).

Almost surely, 2^652683621 is an apocalyptic number.

It is an amenable number.

652683621 is a deficient number, since it is larger than the sum of its proper divisors (217561211).

652683621 is a wasteful number, since it uses less digits than its factorization.

652683621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217561210.

The product of its digits is 103680, while the sum is 39.

The square root of 652683621 is about 25547.6734948605. The cubic root of 652683621 is about 867.4296004904.

The spelling of 652683621 in words is "six hundred fifty-two million, six hundred eighty-three thousand, six hundred twenty-one".