99680857 has 8 divisors (see below), whose sum is σ = 101575040. Its totient is φ = 97802640.

The previous prime is 99680773. The next prime is 99680899. The reversal of 99680857 is 75808699.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99680857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99680557) 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, 9007 + ... + 16747.

It is an arithmetic number, because the mean of its divisors is an integer number (12696880).

Almost surely, 2^99680857 is an apocalyptic number.

It is an amenable number.

99680857 is a deficient number, since it is larger than the sum of its proper divisors (1894183).

99680857 is a wasteful number, since it uses less digits than its factorization.

99680857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7983.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 99680857 is about 9984.0300981117. The cubic root of 99680857 is about 463.6645802815.

The spelling of 99680857 in words is "ninety-nine million, six hundred eighty thousand, eight hundred fifty-seven".