111798993 has 4 divisors (see below), whose sum is σ = 149065328. Its totient is φ = 74532660.

The previous prime is 111798971. The next prime is 111798997. The reversal of 111798993 is 399897111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399897111 = 3 ⋅133299037.

It is not a de Polignac number, because 111798993 - 2⁵ = 111798961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111798997) 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, 18633163 + ... + 18633168.

It is an arithmetic number, because the mean of its divisors is an integer number (37266332).

Almost surely, 2^111798993 is an apocalyptic number.

It is an amenable number.

111798993 is a deficient number, since it is larger than the sum of its proper divisors (37266335).

111798993 is an equidigital number, since it uses as much as digits as its factorization.

111798993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37266334.

The product of its digits is 122472, while the sum is 48.

The square root of 111798993 is about 10573.5042913880. The cubic root of 111798993 is about 481.7399138031.

The spelling of 111798993 in words is "one hundred eleven million, seven hundred ninety-eight thousand, nine hundred ninety-three".