81700964 has 12 divisors (see below), whose sum is σ = 143231088. Its totient is φ = 40777800.

The previous prime is 81700937. The next prime is 81701029. The reversal of 81700964 is 46900718.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15602 + ... + 20169.

It is an arithmetic number, because the mean of its divisors is an integer number (11935924).

Almost surely, 2^81700964 is an apocalyptic number.

It is an amenable number.

81700964 is a deficient number, since it is larger than the sum of its proper divisors (61530124).

81700964 is a wasteful number, since it uses less digits than its factorization.

81700964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36346 (or 36344 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 81700964 is about 9038.8585562559. The cubic root of 81700964 is about 433.9193929594.

The spelling of 81700964 in words is "eighty-one million, seven hundred thousand, nine hundred sixty-four".