682534921 has 8 divisors (see below), whose sum is σ = 723064104. Its totient is φ = 642048000.

The previous prime is 682534907. The next prime is 682534927. The reversal of 682534921 is 129435286.

It can be written as a sum of positive squares in 4 ways, for example, as 541696 + 681993225 = 736^2 + 26115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 682534921 - 2²⁷ = 548317193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (682534927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26421 + ... + 45421.

It is an arithmetic number, because the mean of its divisors is an integer number (90383013).

Almost surely, 2^682534921 is an apocalyptic number.

It is an amenable number.

682534921 is a deficient number, since it is larger than the sum of its proper divisors (40529183).

682534921 is a wasteful number, since it uses less digits than its factorization.

682534921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21131.

The product of its digits is 103680, while the sum is 40.

The square root of 682534921 is about 26125.3692988252. The cubic root of 682534921 is about 880.4572868675.

The spelling of 682534921 in words is "six hundred eighty-two million, five hundred thirty-four thousand, nine hundred twenty-one".