681368492 has 12 divisors (see below), whose sum is σ = 1362737040. Its totient is φ = 292015056.

The previous prime is 681368473. The next prime is 681368563. The reversal of 681368492 is 294863186.

681368492 is an admirable number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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, 12167267 + ... + 12167322.

It is an arithmetic number, because the mean of its divisors is an integer number (113561420).

Almost surely, 2^681368492 is an apocalyptic number.

It is an amenable number.

681368492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681368492 is a wasteful number, since it uses less digits than its factorization.

681368492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24334600 (or 24334598 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 681368492 is about 26103.0360686262. The cubic root of 681368492 is about 879.9554436807.

The spelling of 681368492 in words is "six hundred eighty-one million, three hundred sixty-eight thousand, four hundred ninety-two".