681333492 has 48 divisors (see below), whose sum is σ = 1829116800. Its totient is φ = 193356672.

The previous prime is 681333473. The next prime is 681333493. The reversal of 681333492 is 294333186.

It is a self number, because there is not a number n which added to its sum of digits gives 681333492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681333493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14703 + ... + 39734.

It is an arithmetic number, because the mean of its divisors is an integer number (38106600).

Almost surely, 2^681333492 is an apocalyptic number.

It is an amenable number.

681333492 is an abundant number, since it is smaller than the sum of its proper divisors (1147783308).

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

681333492 is a wasteful number, since it uses less digits than its factorization.

681333492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54600 (or 54598 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 681333492 is about 26102.3656399185. The cubic root of 681333492 is about 879.9403764700.

The spelling of 681333492 in words is "six hundred eighty-one million, three hundred thirty-three thousand, four hundred ninety-two".