1171258889 has 2 divisors, whose sum is σ = 1171258890. Its totient is φ = 1171258888.

The previous prime is 1171258871. The next prime is 1171258903. The reversal of 1171258889 is 9888521711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755425225 + 415833664 = 27485^2 + 20392^2 .

It is an emirp because it is prime and its reverse (9888521711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1171258889 - 2²⁰ = 1170210313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171258859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585629444 + 585629445.

It is an arithmetic number, because the mean of its divisors is an integer number (585629445).

Almost surely, 2^1171258889 is an apocalyptic number.

It is an amenable number.

1171258889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171258889 is an equidigital number, since it uses as much as digits as its factorization.

1171258889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 50.

The square root of 1171258889 is about 34223.6597838396. The cubic root of 1171258889 is about 1054.1060354539.

The spelling of 1171258889 in words is "one billion, one hundred seventy-one million, two hundred fifty-eight thousand, eight hundred eighty-nine".