99991036 has 12 divisors (see below), whose sum is σ = 175194040. Its totient is φ = 49935600.

The previous prime is 99991033. The next prime is 99991049. The reversal of 99991036 is 63019999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99991033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11115 + ... + 17986.

Almost surely, 2^99991036 is an apocalyptic number.

It is an amenable number.

99991036 is a deficient number, since it is larger than the sum of its proper divisors (75203004).

99991036 is a wasteful number, since it uses less digits than its factorization.

99991036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29964 (or 29962 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 99991036 is about 9999.5517899554. The cubic root of 99991036 is about 464.1450138794.

The spelling of 99991036 in words is "ninety-nine million, nine hundred ninety-one thousand, thirty-six".