1159597091 has 4 divisors (see below), whose sum is σ = 1160267952. Its totient is φ = 1158926232.

The previous prime is 1159597069. The next prime is 1159597093. The reversal of 1159597091 is 1907959511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1159597091 - 2⁶ = 1159597027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1159597093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332831 + ... + 336296.

It is an arithmetic number, because the mean of its divisors is an integer number (290066988).

Almost surely, 2^1159597091 is an apocalyptic number.

1159597091 is a deficient number, since it is larger than the sum of its proper divisors (670861).

1159597091 is an equidigital number, since it uses as much as digits as its factorization.

1159597091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670860.

The product of its (nonzero) digits is 127575, while the sum is 47.

The square root of 1159597091 is about 34052.8573103638. The cubic root of 1159597091 is about 1050.5959099610.

The spelling of 1159597091 in words is "one billion, one hundred fifty-nine million, five hundred ninety-seven thousand, ninety-one".