111117899 has 24 divisors (see below), whose sum is σ = 125403360. Its totient is φ = 98233344.

The previous prime is 111117889. The next prime is 111117901. The reversal of 111117899 is 998711111.

111117899 = T₄₈₂ + T₄₈₃ + ... + T₉₁₉.

It is a happy number.

It is not a de Polignac number, because 111117899 - 2⁴ = 111117883 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111117889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 485117 + ... + 485345.

It is an arithmetic number, because the mean of its divisors is an integer number (5225140).

Almost surely, 2^111117899 is an apocalyptic number.

111117899 is a deficient number, since it is larger than the sum of its proper divisors (14285461).

111117899 is a wasteful number, since it uses less digits than its factorization.

111117899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 342 counting only the distinct ones).

The product of its digits is 4536, while the sum is 38.

The square root of 111117899 is about 10541.2475068182. The cubic root of 111117899 is about 480.7596463996.

The spelling of 111117899 in words is "one hundred eleven million, one hundred seventeen thousand, eight hundred ninety-nine".