25205189 has 2 divisors, whose sum is σ = 25205190. Its totient is φ = 25205188.

The previous prime is 25205183. The next prime is 25205197. The reversal of 25205189 is 98150252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16265089 + 8940100 = 4033^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 25205189 - 2¹² = 25201093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25205183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12602594 + 12602595.

It is an arithmetic number, because the mean of its divisors is an integer number (12602595).

Almost surely, 2^25205189 is an apocalyptic number.

It is an amenable number.

25205189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25205189 is an equidigital number, since it uses as much as digits as its factorization.

25205189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 25205189 is about 5020.4769693725. The cubic root of 25205189 is about 293.1995635179.

The spelling of 25205189 in words is "twenty-five million, two hundred five thousand, one hundred eighty-nine".