25286389 has 2 divisors, whose sum is σ = 25286390. Its totient is φ = 25286388.

The previous prime is 25286377. The next prime is 25286411. The reversal of 25286389 is 98368252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 4765489 = 4530^2 + 2183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25286389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25286189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12643194 + 12643195.

It is an arithmetic number, because the mean of its divisors is an integer number (12643195).

Almost surely, 2^25286389 is an apocalyptic number.

It is an amenable number.

25286389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25286389 is an equidigital number, since it uses as much as digits as its factorization.

25286389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 25286389 is about 5028.5573477887. The cubic root of 25286389 is about 293.5140792331.

The spelling of 25286389 in words is "twenty-five million, two hundred eighty-six thousand, three hundred eighty-nine".