111859019 has 2 divisors, whose sum is σ = 111859020. Its totient is φ = 111859018.

The previous prime is 111858983. The next prime is 111859021. The reversal of 111859019 is 910958111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111859019 is a prime.

It is a super-2 number, since 2×111859019² = 25024880263284722, which contains 22 as substring.

Together with 111859021, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111859019.

It is not a weakly prime, because it can be changed into another prime (111859049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55929509 + 55929510.

It is an arithmetic number, because the mean of its divisors is an integer number (55929510).

Almost surely, 2^111859019 is an apocalyptic number.

111859019 is a deficient number, since it is larger than the sum of its proper divisors (1).

111859019 is an equidigital number, since it uses as much as digits as its factorization.

111859019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 35.

The square root of 111859019 is about 10576.3424207048. The cubic root of 111859019 is about 481.8261153736.

The spelling of 111859019 in words is "one hundred eleven million, eight hundred fifty-nine thousand, nineteen".