682972621 has 4 divisors (see below), whose sum is σ = 683081244. Its totient is φ = 682864000.

The previous prime is 682972601. The next prime is 682972627. The reversal of 682972621 is 126279286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98783721 + 584188900 = 9939^2 + 24170^2 .

It is a cyclic number.

It is not a de Polignac number, because 682972621 - 2²⁷ = 548754893 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 (682972627) 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, 44260 + ... + 57661.

It is an arithmetic number, because the mean of its divisors is an integer number (170770311).

Almost surely, 2^682972621 is an apocalyptic number.

It is an amenable number.

682972621 is a deficient number, since it is larger than the sum of its proper divisors (108623).

682972621 is a wasteful number, since it uses less digits than its factorization.

682972621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108622.

The product of its digits is 145152, while the sum is 43.

The square root of 682972621 is about 26133.7448713345. The cubic root of 682972621 is about 880.6454549222.

The spelling of 682972621 in words is "six hundred eighty-two million, nine hundred seventy-two thousand, six hundred twenty-one".