99989785 has 16 divisors (see below), whose sum is σ = 137540736. Its totient is φ = 68358528.

The previous prime is 99989783. The next prime is 99989803. The reversal of 99989785 is 58798999.

It is not a de Polignac number, because 99989785 - 2¹ = 99989783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99989783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8029 + ... + 16261.

It is an arithmetic number, because the mean of its divisors is an integer number (8596296).

Almost surely, 2^99989785 is an apocalyptic number.

It is an amenable number.

99989785 is a deficient number, since it is larger than the sum of its proper divisors (37550951).

99989785 is a wasteful number, since it uses less digits than its factorization.

99989785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8592.

The product of its digits is 14696640, while the sum is 64.

The square root of 99989785 is about 9999.4892369561. The cubic root of 99989785 is about 464.1430782131.

The spelling of 99989785 in words is "ninety-nine million, nine hundred eighty-nine thousand, seven hundred eighty-five".