111116591 has 2 divisors, whose sum is σ = 111116592. Its totient is φ = 111116590.

The previous prime is 111116569. The next prime is 111116627. The reversal of 111116591 is 195611111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111116591 - 2⁶ = 111116527 is a prime.

It is a super-2 number, since 2×111116591² = 24693793590922562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111116591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111116561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55558295 + 55558296.

It is an arithmetic number, because the mean of its divisors is an integer number (55558296).

Almost surely, 2^111116591 is an apocalyptic number.

111116591 is a deficient number, since it is larger than the sum of its proper divisors (1).

111116591 is an equidigital number, since it uses as much as digits as its factorization.

111116591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 26.

The square root of 111116591 is about 10541.1854646430. The cubic root of 111116591 is about 480.7577600066.

The spelling of 111116591 in words is "one hundred eleven million, one hundred sixteen thousand, five hundred ninety-one".