25889993 has 2 divisors, whose sum is σ = 25889994. Its totient is φ = 25889992.

The previous prime is 25889987. The next prime is 25890043. The reversal of 25889993 is 39998852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 6775609 = 4372^2 + 2603^2 .

It is a cyclic number.

It is not a de Polignac number, because 25889993 - 2¹⁰ = 25888969 is a prime.

It is not a weakly prime, because it can be changed into another prime (25889933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12944996 + 12944997.

It is an arithmetic number, because the mean of its divisors is an integer number (12944997).

Almost surely, 2^25889993 is an apocalyptic number.

It is an amenable number.

25889993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25889993 is an equidigital number, since it uses as much as digits as its factorization.

25889993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 53.

The square root of 25889993 is about 5088.2210054203. The cubic root of 25889993 is about 295.8312016951.

The spelling of 25889993 in words is "twenty-five million, eight hundred eighty-nine thousand, nine hundred ninety-three".