111719819 has 2 divisors, whose sum is σ = 111719820. Its totient is φ = 111719818.

The previous prime is 111719779. The next prime is 111719851. The reversal of 111719819 is 918917111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111719819 is a prime.

It is a super-2 number, since 2×111719819² = 24962635914785522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111719879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55859909 + 55859910.

It is an arithmetic number, because the mean of its divisors is an integer number (55859910).

Almost surely, 2^111719819 is an apocalyptic number.

111719819 is a deficient number, since it is larger than the sum of its proper divisors (1).

111719819 is an equidigital number, since it uses as much as digits as its factorization.

111719819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 38.

The square root of 111719819 is about 10569.7596472200. The cubic root of 111719819 is about 481.6261671521.

The spelling of 111719819 in words is "one hundred eleven million, seven hundred nineteen thousand, eight hundred nineteen".