81710700 has 36 divisors (see below), whose sum is σ = 236417160. Its totient is φ = 21789440.

The previous prime is 81710677. The next prime is 81710711. The reversal of 81710700 is 701718.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135885 + ... + 136484.

Almost surely, 2^81710700 is an apocalyptic number.

It is an amenable number.

81710700 is an abundant number, since it is smaller than the sum of its proper divisors (154706460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81710700 is a wasteful number, since it uses less digits than its factorization.

81710700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272386 (or 272379 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 81710700 is about 9039.3971037896. The cubic root of 81710700 is about 433.9366284615.

The spelling of 81710700 in words is "eighty-one million, seven hundred ten thousand, seven hundred".