25157189 has 2 divisors, whose sum is σ = 25157190. Its totient is φ = 25157188.

The previous prime is 25157177. The next prime is 25157191. The reversal of 25157189 is 98175152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22877089 + 2280100 = 4783^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 25157189 - 2²⁰ = 24108613 is a prime.

It is a Sophie Germain prime.

Together with 25157191, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25157389) 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, 12578594 + 12578595.

It is an arithmetic number, because the mean of its divisors is an integer number (12578595).

Almost surely, 2^25157189 is an apocalyptic number.

It is an amenable number.

25157189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25157189 is an equidigital number, since it uses as much as digits as its factorization.

25157189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 38.

The square root of 25157189 is about 5015.6942689921. The cubic root of 25157189 is about 293.0133251171.

The spelling of 25157189 in words is "twenty-five million, one hundred fifty-seven thousand, one hundred eighty-nine".