8134561889 has 2 divisors, whose sum is σ = 8134561890. Its totient is φ = 8134561888.

The previous prime is 8134561873. The next prime is 8134561891. The reversal of 8134561889 is 9881654318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8133334225 + 1227664 = 90185^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 8134561889 - 2⁴ = 8134561873 is a prime.

It is a Sophie Germain prime.

Together with 8134561891, it forms a pair of twin primes.

It is a Chen 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 8134561889.

It is not a weakly prime, because it can be changed into another prime (8134561189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4067280944 + 4067280945.

It is an arithmetic number, because the mean of its divisors is an integer number (4067280945).

Almost surely, 2^8134561889 is an apocalyptic number.

It is an amenable number.

8134561889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8134561889 is an equidigital number, since it uses as much as digits as its factorization.

8134561889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 53.

The square root of 8134561889 is about 90191.8061078721. The cubic root of 8134561889 is about 2011.1512005594.

The spelling of 8134561889 in words is "eight billion, one hundred thirty-four million, five hundred sixty-one thousand, eight hundred eighty-nine".