99385891 has 12 divisors (see below), whose sum is σ = 109557952. Its totient is φ = 90090000.

The previous prime is 99385889. The next prime is 99385933. The reversal of 99385891 is 19858399.

It is not a de Polignac number, because 99385891 - 2¹ = 99385889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99385841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49966 + ... + 51916.

Almost surely, 2^99385891 is an apocalyptic number.

99385891 is a deficient number, since it is larger than the sum of its proper divisors (10172061).

99385891 is a wasteful number, since it uses less digits than its factorization.

99385891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394 (or 2383 counting only the distinct ones).

The product of its digits is 699840, while the sum is 52.

The square root of 99385891 is about 9969.2472634598. The cubic root of 99385891 is about 463.2067845595.

The spelling of 99385891 in words is "ninety-nine million, three hundred eighty-five thousand, eight hundred ninety-one".