681169937 has 8 divisors (see below), whose sum is σ = 779767296. Its totient is φ = 582894432.

The previous prime is 681169933. The next prime is 681169943. The reversal of 681169937 is 739961186.

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

It is a cyclic number.

It is not a de Polignac number, because 681169937 - 2² = 681169933 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681169933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75908 + ... + 84405.

It is an arithmetic number, because the mean of its divisors is an integer number (97470912).

Almost surely, 2^681169937 is an apocalyptic number.

It is an amenable number.

681169937 is a deficient number, since it is larger than the sum of its proper divisors (98597359).

681169937 is a wasteful number, since it uses less digits than its factorization.

681169937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160927.

The product of its digits is 489888, while the sum is 50.

The square root of 681169937 is about 26099.2324982939. The cubic root of 681169937 is about 879.8699605540.

The spelling of 681169937 in words is "six hundred eighty-one million, one hundred sixty-nine thousand, nine hundred thirty-seven".