99911123 has 8 divisors (see below), whose sum is σ = 107742768. Its totient is φ = 92100384.

The previous prime is 99911093. The next prime is 99911183. The reversal of 99911123 is 32111999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99911123 - 2¹⁸ = 99648979 is a prime.

It is a super-2 number, since 2×99911123² = 19964464998242258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99911183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5540 + ... + 15182.

It is an arithmetic number, because the mean of its divisors is an integer number (13467846).

Almost surely, 2^99911123 is an apocalyptic number.

99911123 is a deficient number, since it is larger than the sum of its proper divisors (7831645).

99911123 is a wasteful number, since it uses less digits than its factorization.

99911123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10453.

The product of its digits is 4374, while the sum is 35.

The square root of 99911123 is about 9995.5551621708. Note that the first 3 decimals coincide. The cubic root of 99911123 is about 464.0213324393.

The spelling of 99911123 in words is "ninety-nine million, nine hundred eleven thousand, one hundred twenty-three".