25723189 has 2 divisors, whose sum is σ = 25723190. Its totient is φ = 25723188.

The previous prime is 25723171. The next prime is 25723213. The reversal of 25723189 is 98132752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14554225 + 11168964 = 3815^2 + 3342^2 .

It is a cyclic number.

It is not a de Polignac number, because 25723189 - 2⁵ = 25723157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25723129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12861594 + 12861595.

It is an arithmetic number, because the mean of its divisors is an integer number (12861595).

Almost surely, 2^25723189 is an apocalyptic number.

It is an amenable number.

25723189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25723189 is an equidigital number, since it uses as much as digits as its factorization.

25723189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 25723189 is about 5071.8033282059. The cubic root of 25723189 is about 295.1945054524.

The spelling of 25723189 in words is "twenty-five million, seven hundred twenty-three thousand, one hundred eighty-nine".