111918745 has 4 divisors (see below), whose sum is σ = 134302500. Its totient is φ = 89534992.

The previous prime is 111918739. The next prime is 111918757. The reversal of 111918745 is 547819111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547819111 = 7 ⋅78259873.

It can be written as a sum of positive squares in 2 ways, for example, as 13571856 + 98346889 = 3684^2 + 9917^2 .

It is a cyclic number.

It is not a de Polignac number, because 111918745 - 2¹⁷ = 111787673 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11191870 + ... + 11191879.

It is an arithmetic number, because the mean of its divisors is an integer number (33575625).

Almost surely, 2^111918745 is an apocalyptic number.

It is an amenable number.

111918745 is a deficient number, since it is larger than the sum of its proper divisors (22383755).

111918745 is an equidigital number, since it uses as much as digits as its factorization.

111918745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22383754.

The product of its digits is 10080, while the sum is 37.

The square root of 111918745 is about 10579.1656098201. The cubic root of 111918745 is about 481.9118555208.

The spelling of 111918745 in words is "one hundred eleven million, nine hundred eighteen thousand, seven hundred forty-five".