2585198173 has 2 divisors, whose sum is σ = 2585198174. Its totient is φ = 2585198172.

The previous prime is 2585198089. The next prime is 2585198249. The reversal of 2585198173 is 3718915852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2245053924 + 340144249 = 47382^2 + 18443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2585198173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2585198573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1292599086 + 1292599087.

It is an arithmetic number, because the mean of its divisors is an integer number (1292599087).

Almost surely, 2^2585198173 is an apocalyptic number.

It is an amenable number.

2585198173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2585198173 is an equidigital number, since it uses as much as digits as its factorization.

2585198173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 49.

The square root of 2585198173 is about 50844.8441142266. The cubic root of 2585198173 is about 1372.4544724077.

The spelling of 2585198173 in words is "two billion, five hundred eighty-five million, one hundred ninety-eight thousand, one hundred seventy-three".