99993985 has 16 divisors (see below), whose sum is σ = 147684096. Its totient is φ = 63292608.

The previous prime is 99993947. The next prime is 99993991. The reversal of 99993985 is 58939999.

It is a cyclic number.

It is not a de Polignac number, because 99993985 - 2¹¹ = 99991937 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, 109429 + ... + 110338.

It is an arithmetic number, because the mean of its divisors is an integer number (9230256).

Almost surely, 2^99993985 is an apocalyptic number.

It is an amenable number.

99993985 is a deficient number, since it is larger than the sum of its proper divisors (47690111).

99993985 is a wasteful number, since it uses less digits than its factorization.

99993985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219792.

The product of its digits is 7085880, while the sum is 61.

The square root of 99993985 is about 9999.6992454773. The cubic root of 99993985 is about 464.1495767891.

The spelling of 99993985 in words is "ninety-nine million, nine hundred ninety-three thousand, nine hundred eighty-five".