682007021 has 8 divisors (see below), whose sum is σ = 695300760. Its totient is φ = 668729152.

The previous prime is 682007009. The next prime is 682007041. The reversal of 682007021 is 120700286.

It can be written as a sum of positive squares in 4 ways, for example, as 104325796 + 577681225 = 10214^2 + 24035^2 .

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 682007021 - 2²⁶ = 614898157 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 (682007041) 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, 119591 + ... + 125163.

It is an arithmetic number, because the mean of its divisors is an integer number (86912595).

Almost surely, 2^682007021 is an apocalyptic number.

It is an amenable number.

682007021 is a deficient number, since it is larger than the sum of its proper divisors (13293739).

682007021 is a wasteful number, since it uses less digits than its factorization.

682007021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7935.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 682007021 is about 26115.2641380477. The cubic root of 682007021 is about 880.2302346103.

The spelling of 682007021 in words is "six hundred eighty-two million, seven thousand, twenty-one".