99111959 has 4 divisors (see below), whose sum is σ = 99174504. Its totient is φ = 99049416.

The previous prime is 99111949. The next prime is 99111967. The reversal of 99111959 is 95911199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95911199 = 43 ⋅2230493.

It is a cyclic number.

It is not a de Polignac number, because 99111959 - 2⁸ = 99111703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99111919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28832 + ... + 32085.

It is an arithmetic number, because the mean of its divisors is an integer number (24793626).

Almost surely, 2^99111959 is an apocalyptic number.

99111959 is a deficient number, since it is larger than the sum of its proper divisors (62545).

99111959 is a wasteful number, since it uses less digits than its factorization.

99111959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62544.

The product of its digits is 32805, while the sum is 44.

The square root of 99111959 is about 9955.4989327507. The cubic root of 99111959 is about 462.7808222964.

The spelling of 99111959 in words is "ninety-nine million, one hundred eleven thousand, nine hundred fifty-nine".