1159557209 has 2 divisors, whose sum is σ = 1159557210. Its totient is φ = 1159557208.

The previous prime is 1159557193. The next prime is 1159557229. The reversal of 1159557209 is 9027559511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1152942025 + 6615184 = 33955^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 1159557209 - 2⁴ = 1159557193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1159557209.

It is not a weakly prime, because it can be changed into another prime (1159557229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579778604 + 579778605.

It is an arithmetic number, because the mean of its divisors is an integer number (579778605).

Almost surely, 2^1159557209 is an apocalyptic number.

It is an amenable number.

1159557209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159557209 is an equidigital number, since it uses as much as digits as its factorization.

1159557209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141750, while the sum is 44.

The square root of 1159557209 is about 34052.2717157020. The cubic root of 1159557209 is about 1050.5838654481.

The spelling of 1159557209 in words is "one billion, one hundred fifty-nine million, five hundred fifty-seven thousand, two hundred nine".