682781513 has 4 divisors (see below), whose sum is σ = 689541828. Its totient is φ = 676021200.

The previous prime is 682781509. The next prime is 682781521. The reversal of 682781513 is 315187286.

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 669619129 + 13162384 = 25877^2 + 3628^2 .

It is a cyclic number.

It is not a de Polignac number, because 682781513 - 2² = 682781509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (682781543) 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, 3380006 + ... + 3380207.

It is an arithmetic number, because the mean of its divisors is an integer number (172385457).

Almost surely, 2^682781513 is an apocalyptic number.

It is an amenable number.

682781513 is a deficient number, since it is larger than the sum of its proper divisors (6760315).

682781513 is a wasteful number, since it uses less digits than its factorization.

682781513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6760314.

The product of its digits is 80640, while the sum is 41.

The square root of 682781513 is about 26130.0882700384. The cubic root of 682781513 is about 880.5633071237.

The spelling of 682781513 in words is "six hundred eighty-two million, seven hundred eighty-one thousand, five hundred thirteen".