111116399 has 2 divisors, whose sum is σ = 111116400. Its totient is φ = 111116398.

The previous prime is 111116387. The next prime is 111116407. The reversal of 111116399 is 993611111.

It is a strong prime.

It is an emirp because it is prime and its reverse (993611111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111116399 - 2²⁰ = 110067823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111116309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55558199 + 55558200.

It is an arithmetic number, because the mean of its divisors is an integer number (55558200).

Almost surely, 2^111116399 is an apocalyptic number.

111116399 is a deficient number, since it is larger than the sum of its proper divisors (1).

111116399 is an equidigital number, since it uses as much as digits as its factorization.

111116399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 32.

The square root of 111116399 is about 10541.1763575039. The cubic root of 111116399 is about 480.7574831036.

The spelling of 111116399 in words is "one hundred eleven million, one hundred sixteen thousand, three hundred ninety-nine".