681567934 has 8 divisors (see below), whose sum is σ = 1022580000. Its totient is φ = 340707936.

The previous prime is 681567923. The next prime is 681567949. The reversal of 681567934 is 439765186.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26059 + ... + 45190.

It is an arithmetic number, because the mean of its divisors is an integer number (127822500).

Almost surely, 2^681567934 is an apocalyptic number.

681567934 is a deficient number, since it is larger than the sum of its proper divisors (341012066).

681567934 is a wasteful number, since it uses less digits than its factorization.

681567934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76034.

The product of its digits is 1088640, while the sum is 49.

The square root of 681567934 is about 26106.8560726871. The cubic root of 681567934 is about 880.0412919674.

The spelling of 681567934 in words is "six hundred eighty-one million, five hundred sixty-seven thousand, nine hundred thirty-four".