834317989 has 2 divisors, whose sum is σ = 834317990. Its totient is φ = 834317988.

The previous prime is 834317983. The next prime is 834317999. The reversal of 834317989 is 989713438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654489889 + 179828100 = 25583^2 + 13410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-834317989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (834317983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417158994 + 417158995.

It is an arithmetic number, because the mean of its divisors is an integer number (417158995).

Almost surely, 2^834317989 is an apocalyptic number.

It is an amenable number.

834317989 is a deficient number, since it is larger than the sum of its proper divisors (1).

834317989 is an equidigital number, since it uses as much as digits as its factorization.

834317989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 834317989 is about 28884.5631609689. The cubic root of 834317989 is about 941.4065215796.

The spelling of 834317989 in words is "eight hundred thirty-four million, three hundred seventeen thousand, nine hundred eighty-nine".