25889389 has 2 divisors, whose sum is σ = 25889390. Its totient is φ = 25889388.

The previous prime is 25889341. The next prime is 25889393. The reversal of 25889389 is 98398852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 5368489 = 4530^2 + 2317^2 .

It is a cyclic number.

It is not a de Polignac number, because 25889389 - 2¹³ = 25881197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25889089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12944694 + 12944695.

It is an arithmetic number, because the mean of its divisors is an integer number (12944695).

Almost surely, 2^25889389 is an apocalyptic number.

It is an amenable number.

25889389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25889389 is an equidigital number, since it uses as much as digits as its factorization.

25889389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 52.

The square root of 25889389 is about 5088.1616523063. The cubic root of 25889389 is about 295.8289011481.

The spelling of 25889389 in words is "twenty-five million, eight hundred eighty-nine thousand, three hundred eighty-nine".