111319919 has 2 divisors, whose sum is σ = 111319920. Its totient is φ = 111319918.

The previous prime is 111319913. The next prime is 111319933. The reversal of 111319919 is 919913111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111319919 is a prime.

It is a super-2 number, since 2×111319919² = 24784248732333122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111319913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55659959 + 55659960.

It is an arithmetic number, because the mean of its divisors is an integer number (55659960).

Almost surely, 2^111319919 is an apocalyptic number.

111319919 is a deficient number, since it is larger than the sum of its proper divisors (1).

111319919 is an equidigital number, since it uses as much as digits as its factorization.

111319919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187, while the sum is 35.

The square root of 111319919 is about 10550.8255127265. The cubic root of 111319919 is about 481.0508214045.

The spelling of 111319919 in words is "one hundred eleven million, three hundred nineteen thousand, nine hundred nineteen".