1123457791 has 2 divisors, whose sum is σ = 1123457792. Its totient is φ = 1123457790.

The previous prime is 1123457773. The next prime is 1123457813. The reversal of 1123457791 is 1977543211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123457791 - 2⁵ = 1123457759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123457711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561728895 + 561728896.

It is an arithmetic number, because the mean of its divisors is an integer number (561728896).

Almost surely, 2^1123457791 is an apocalyptic number.

1123457791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123457791 is an equidigital number, since it uses as much as digits as its factorization.

1123457791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 1123457791 is about 33518.0218837568. The cubic root of 1123457791 is about 1039.5664461965.

The spelling of 1123457791 in words is "one billion, one hundred twenty-three million, four hundred fifty-seven thousand, seven hundred ninety-one".