25535189 has 2 divisors, whose sum is σ = 25535190. Its totient is φ = 25535188.

The previous prime is 25535177. The next prime is 25535197. The reversal of 25535189 is 98153552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18852964 + 6682225 = 4342^2 + 2585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25535189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25535119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12767594 + 12767595.

It is an arithmetic number, because the mean of its divisors is an integer number (12767595).

Almost surely, 2^25535189 is an apocalyptic number.

It is an amenable number.

25535189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25535189 is an equidigital number, since it uses as much as digits as its factorization.

25535189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 38.

The square root of 25535189 is about 5053.2354981734. The cubic root of 25535189 is about 294.4735953682.

The spelling of 25535189 in words is "twenty-five million, five hundred thirty-five thousand, one hundred eighty-nine".