1123230091 has 2 divisors, whose sum is σ = 1123230092. Its totient is φ = 1123230090.

The previous prime is 1123230089. The next prime is 1123230169. The reversal of 1123230091 is 1900323211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123230091 - 2¹ = 1123230089 is a prime.

Together with 1123230089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1123230041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561615045 + 561615046.

It is an arithmetic number, because the mean of its divisors is an integer number (561615046).

Almost surely, 2^1123230091 is an apocalyptic number.

1123230091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123230091 is an equidigital number, since it uses as much as digits as its factorization.

1123230091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1123230091 is about 33514.6250314695. The cubic root of 1123230091 is about 1039.4962090900.

The spelling of 1123230091 in words is "one billion, one hundred twenty-three million, two hundred thirty thousand, ninety-one".