1159173989 has 2 divisors, whose sum is σ = 1159173990. Its totient is φ = 1159173988.

The previous prime is 1159173947. The next prime is 1159173991. The reversal of 1159173989 is 9893719511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590733025 + 568440964 = 24305^2 + 23842^2 .

It is a cyclic number.

It is not a de Polignac number, because 1159173989 - 2²⁸ = 890738533 is a prime.

Together with 1159173991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1159173989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1159173889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579586994 + 579586995.

It is an arithmetic number, because the mean of its divisors is an integer number (579586995).

Almost surely, 2^1159173989 is an apocalyptic number.

It is an amenable number.

1159173989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159173989 is an equidigital number, since it uses as much as digits as its factorization.

1159173989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 53.

The square root of 1159173989 is about 34046.6443133534. The cubic root of 1159173989 is about 1050.4681174982.

The spelling of 1159173989 in words is "one billion, one hundred fifty-nine million, one hundred seventy-three thousand, nine hundred eighty-nine".