682724642 has 8 divisors (see below), whose sum is σ = 1024258332. Its totient is φ = 341305200.

The previous prime is 682724621. The next prime is 682724657. The reversal of 682724642 is 246427286.

It is a Cunningham number, because it is equal to 26129²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 682724641 + 1 = 26129^2 + 1^2 .

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

It is a super-2 number, since 2×682724642² = 932225873588056328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 682724642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11609 + ... + 38732.

Almost surely, 2^682724642 is an apocalyptic number.

682724642 is a deficient number, since it is larger than the sum of its proper divisors (341533690).

682724642 is a wasteful number, since it uses less digits than its factorization.

682724642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57124.

The product of its digits is 258048, while the sum is 41.

The square root of 682724642 is about 26129.0000191358. Note that the first 4 decimals coincide. The cubic root of 682724642 is about 880.5388581576.

The spelling of 682724642 in words is "six hundred eighty-two million, seven hundred twenty-four thousand, six hundred forty-two".