111117913 has 4 divisors (see below), whose sum is σ = 113828148. Its totient is φ = 108407680.

The previous prime is 111117901. The next prime is 111117943. The reversal of 111117913 is 319711111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37295449 + 73822464 = 6107^2 + 8592^2 .

It is a cyclic number.

It is not a de Polignac number, because 111117913 - 2²⁵ = 77563481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111117943) 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, 1355056 + ... + 1355137.

It is an arithmetic number, because the mean of its divisors is an integer number (28457037).

Almost surely, 2^111117913 is an apocalyptic number.

It is an amenable number.

111117913 is a deficient number, since it is larger than the sum of its proper divisors (2710235).

111117913 is an equidigital number, since it uses as much as digits as its factorization.

111117913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710234.

The product of its digits is 189, while the sum is 25.

The square root of 111117913 is about 10541.2481708762. The cubic root of 111117913 is about 480.7596665903.

The spelling of 111117913 in words is "one hundred eleven million, one hundred seventeen thousand, nine hundred thirteen".