111957091 has 2 divisors, whose sum is σ = 111957092. Its totient is φ = 111957090.

The previous prime is 111957071. The next prime is 111957119. The reversal of 111957091 is 190759111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111957091 - 2⁵ = 111957059 is a prime.

It is equal to p_6408754 and since 111957091 and 6408754 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (111957011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55978545 + 55978546.

It is an arithmetic number, because the mean of its divisors is an integer number (55978546).

Almost surely, 2^111957091 is an apocalyptic number.

111957091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111957091 is an equidigital number, since it uses as much as digits as its factorization.

111957091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 34.

The square root of 111957091 is about 10580.9777903557. The cubic root of 111957091 is about 481.9668873564.

The spelling of 111957091 in words is "one hundred eleven million, nine hundred fifty-seven thousand, ninety-one".