25850389 has 2 divisors, whose sum is σ = 25850390. Its totient is φ = 25850388.

The previous prime is 25850381. The next prime is 25850441. The reversal of 25850389 is 98305852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24830289 + 1020100 = 4983^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 25850389 - 2³ = 25850381 is a prime.

It is a super-2 number, since 2×25850389² = 1336485222902642, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25850381) 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, 12925194 + 12925195.

It is an arithmetic number, because the mean of its divisors is an integer number (12925195).

Almost surely, 2^25850389 is an apocalyptic number.

It is an amenable number.

25850389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25850389 is an equidigital number, since it uses as much as digits as its factorization.

25850389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 25850389 is about 5084.3277825097. The cubic root of 25850389 is about 295.6802800881.

The spelling of 25850389 in words is "twenty-five million, eight hundred fifty thousand, three hundred eighty-nine".