681294956 has 6 divisors (see below), whose sum is σ = 1192266180. Its totient is φ = 340647476.

The previous prime is 681294947. The next prime is 681294961. The reversal of 681294956 is 659492186.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85161866 + ... + 85161873.

It is an arithmetic number, because the mean of its divisors is an integer number (198711030).

Almost surely, 2^681294956 is an apocalyptic number.

It is an amenable number.

681294956 is a deficient number, since it is larger than the sum of its proper divisors (510971224).

681294956 is a wasteful number, since it uses less digits than its factorization.

681294956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170323743 (or 170323741 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 681294956 is about 26101.6274588387. The cubic root of 681294956 is about 879.9237864437.

The spelling of 681294956 in words is "six hundred eighty-one million, two hundred ninety-four thousand, nine hundred fifty-six".