1151320091 has 2 divisors, whose sum is σ = 1151320092. Its totient is φ = 1151320090.

The previous prime is 1151320069. The next prime is 1151320099. The reversal of 1151320091 is 1900231511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1151320091 - 2²² = 1147125787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1151320099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575660045 + 575660046.

It is an arithmetic number, because the mean of its divisors is an integer number (575660046).

Almost surely, 2^1151320091 is an apocalyptic number.

1151320091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151320091 is an equidigital number, since it uses as much as digits as its factorization.

1151320091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 1151320091 is about 33931.1080131492. The cubic root of 1151320091 is about 1048.0902826457.

The spelling of 1151320091 in words is "one billion, one hundred fifty-one million, three hundred twenty thousand, ninety-one".