1179340891 has 2 divisors, whose sum is σ = 1179340892. Its totient is φ = 1179340890.

The previous prime is 1179340879. The next prime is 1179340909. The reversal of 1179340891 is 1980439711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1179340891 - 2⁵ = 1179340859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1179340861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589670445 + 589670446.

It is an arithmetic number, because the mean of its divisors is an integer number (589670446).

Almost surely, 2^1179340891 is an apocalyptic number.

1179340891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1179340891 is an equidigital number, since it uses as much as digits as its factorization.

1179340891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1179340891 is about 34341.5330321755. The cubic root of 1179340891 is about 1056.5250186564.

The spelling of 1179340891 in words is "one billion, one hundred seventy-nine million, three hundred forty thousand, eight hundred ninety-one".