681261932 has 24 divisors (see below), whose sum is σ = 1339741536. Its totient is φ = 300757248.

The previous prime is 681261907. The next prime is 681261949. The reversal of 681261932 is 239162186.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283613 + ... + 286004.

It is an arithmetic number, because the mean of its divisors is an integer number (55822564).

Almost surely, 2^681261932 is an apocalyptic number.

It is an amenable number.

681261932 is a deficient number, since it is larger than the sum of its proper divisors (658479604).

681261932 is a wasteful number, since it uses less digits than its factorization.

681261932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569657 (or 569655 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 681261932 is about 26100.9948469402. The cubic root of 681261932 is about 879.9095688754.

The spelling of 681261932 in words is "six hundred eighty-one million, two hundred sixty-one thousand, nine hundred thirty-two".