111108919 has 2 divisors, whose sum is σ = 111108920. Its totient is φ = 111108918.

The previous prime is 111108917. The next prime is 111108931. The reversal of 111108919 is 919801111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111108919 - 2¹ = 111108917 is a prime.

It is a super-2 number, since 2×111108919² = 24690383762697122, which contains 22 as substring.

Together with 111108917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111108917) 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 as a sum of consecutive naturals, namely, 55554459 + 55554460.

It is an arithmetic number, because the mean of its divisors is an integer number (55554460).

Almost surely, 2^111108919 is an apocalyptic number.

111108919 is a deficient number, since it is larger than the sum of its proper divisors (1).

111108919 is an equidigital number, since it uses as much as digits as its factorization.

111108919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 31.

The square root of 111108919 is about 10540.8215524218. The cubic root of 111108919 is about 480.7466951770.

The spelling of 111108919 in words is "one hundred eleven million, one hundred eight thousand, nine hundred nineteen".