111628091 has 2 divisors, whose sum is σ = 111628092. Its totient is φ = 111628090.

The previous prime is 111628079. The next prime is 111628133. The reversal of 111628091 is 190826111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111628091 - 2²⁶ = 44519227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111628061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55814045 + 55814046.

It is an arithmetic number, because the mean of its divisors is an integer number (55814046).

Almost surely, 2^111628091 is an apocalyptic number.

111628091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111628091 is an equidigital number, since it uses as much as digits as its factorization.

111628091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 111628091 is about 10565.4195846639. The cubic root of 111628091 is about 481.4943173693.

The spelling of 111628091 in words is "one hundred eleven million, six hundred twenty-eight thousand, ninety-one".