99705985 has 16 divisors (see below), whose sum is σ = 122472000. Its totient is φ = 77896000.

The previous prime is 99705971. The next prime is 99706001. The reversal of 99705985 is 58950799.

It is a de Polignac number, because none of the positive numbers 2^k-99705985 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65766 + ... + 67264.

It is an arithmetic number, because the mean of its divisors is an integer number (7654500).

Almost surely, 2^99705985 is an apocalyptic number.

It is an amenable number.

99705985 is a deficient number, since it is larger than the sum of its proper divisors (22766015).

99705985 is a wasteful number, since it uses less digits than its factorization.

99705985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808.

The product of its (nonzero) digits is 1020600, while the sum is 52.

The square root of 99705985 is about 9985.2884284832. The cubic root of 99705985 is about 463.7035378943.

The spelling of 99705985 in words is "ninety-nine million, seven hundred five thousand, nine hundred eighty-five".