111243993 has 16 divisors (see below), whose sum is σ = 178437120. Its totient is φ = 60222096.

The previous prime is 111243989. The next prime is 111244009. The reversal of 111243993 is 399342111.

It is a happy number.

It is not a de Polignac number, because 111243993 - 2² = 111243989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111243943) 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, 139005 + ... + 139802.

It is an arithmetic number, because the mean of its divisors is an integer number (11152320).

Almost surely, 2^111243993 is an apocalyptic number.

It is an amenable number.

111243993 is a deficient number, since it is larger than the sum of its proper divisors (67193127).

111243993 is a wasteful number, since it uses less digits than its factorization.

111243993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278836.

The product of its digits is 5832, while the sum is 33.

The square root of 111243993 is about 10547.2267919108. The cubic root of 111243993 is about 480.9414292670.

The spelling of 111243993 in words is "one hundred eleven million, two hundred forty-three thousand, nine hundred ninety-three".