111591059 has 2 divisors, whose sum is σ = 111591060. Its totient is φ = 111591058.

The previous prime is 111590993. The next prime is 111591079. The reversal of 111591059 is 950195111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111591059 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111591079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55795529 + 55795530.

It is an arithmetic number, because the mean of its divisors is an integer number (55795530).

Almost surely, 2^111591059 is an apocalyptic number.

111591059 is a deficient number, since it is larger than the sum of its proper divisors (1).

111591059 is an equidigital number, since it uses as much as digits as its factorization.

111591059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025, while the sum is 32.

The square root of 111591059 is about 10563.6669296225. Note that the first 3 decimals coincide. The cubic root of 111591059 is about 481.4410671241.

The spelling of 111591059 in words is "one hundred eleven million, five hundred ninety-one thousand, fifty-nine".