682684581 has 4 divisors (see below), whose sum is σ = 910246112. Its totient is φ = 455123052.

The previous prime is 682684571. The next prime is 682684601. The reversal of 682684581 is 185486286.

It is a happy number.

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 682684581 - 2⁹ = 682684069 is a prime.

It is a super-2 number, since 2×682684581² = 932116474270291122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 682684581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682684531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113780761 + ... + 113780766.

It is an arithmetic number, because the mean of its divisors is an integer number (227561528).

Almost surely, 2^682684581 is an apocalyptic number.

It is an amenable number.

682684581 is a deficient number, since it is larger than the sum of its proper divisors (227561531).

682684581 is a wasteful number, since it uses less digits than its factorization.

682684581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227561530.

The product of its digits is 737280, while the sum is 48.

The square root of 682684581 is about 26128.2334075613. The cubic root of 682684581 is about 880.5216350318.

The spelling of 682684581 in words is "six hundred eighty-two million, six hundred eighty-four thousand, five hundred eighty-one".