681500237 has 16 divisors (see below), whose sum is σ = 763076160. Its totient is φ = 603254400.

The previous prime is 681500219. The next prime is 681500243. The reversal of 681500237 is 732005186.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681500237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681500137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296063 + ... + 298355.

It is an arithmetic number, because the mean of its divisors is an integer number (47692260).

Almost surely, 2^681500237 is an apocalyptic number.

It is an amenable number.

681500237 is a deficient number, since it is larger than the sum of its proper divisors (81575923).

681500237 is a wasteful number, since it uses less digits than its factorization.

681500237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 681500237 is about 26105.5595036766. The cubic root of 681500237 is about 880.0121541882.

The spelling of 681500237 in words is "six hundred eighty-one million, five hundred thousand, two hundred thirty-seven".