111640199 has 4 divisors (see below), whose sum is σ = 121789320. Its totient is φ = 101491080.

The previous prime is 111640163. The next prime is 111640223. The reversal of 111640199 is 991046111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111640199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111640129) by changing a digit.

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, 5074544 + ... + 5074565.

It is an arithmetic number, because the mean of its divisors is an integer number (30447330).

Almost surely, 2^111640199 is an apocalyptic number.

111640199 is a deficient number, since it is larger than the sum of its proper divisors (10149121).

111640199 is a wasteful number, since it uses less digits than its factorization.

111640199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10149120.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 111640199 is about 10565.9925705066. The cubic root of 111640199 is about 481.5117255395.

The spelling of 111640199 in words is "one hundred eleven million, six hundred forty thousand, one hundred ninety-nine".