111138993 has 16 divisors (see below), whose sum is σ = 188172160. Its totient is φ = 63507888.

The previous prime is 111138971. The next prime is 111139019. The reversal of 111138993 is 399831111.

It is not a de Polignac number, because 111138993 - 2¹⁰ = 111137969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111138943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293830 + ... + 294207.

It is an arithmetic number, because the mean of its divisors is an integer number (11760760).

Almost surely, 2^111138993 is an apocalyptic number.

It is an amenable number.

111138993 is a deficient number, since it is larger than the sum of its proper divisors (77033167).

111138993 is an equidigital number, since it uses as much as digits as its factorization.

111138993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588053 (or 588047 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 111138993 is about 10542.2480050509. The cubic root of 111138993 is about 480.7900660483.

It can be divided in two parts, 1111 and 38993, that added together give a palindrome (40104).

The spelling of 111138993 in words is "one hundred eleven million, one hundred thirty-eight thousand, nine hundred ninety-three".