25388887 has 2 divisors, whose sum is σ = 25388888. Its totient is φ = 25388886.

The previous prime is 25388861. The next prime is 25388893. The reversal of 25388887 is 78888352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25388887 - 2¹⁹ = 24864599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25388887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25388897) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12694443 + 12694444.

It is an arithmetic number, because the mean of its divisors is an integer number (12694444).

Almost surely, 2^25388887 is an apocalyptic number.

25388887 is a deficient number, since it is larger than the sum of its proper divisors (1).

25388887 is an equidigital number, since it uses as much as digits as its factorization.

25388887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 860160, while the sum is 49.

The square root of 25388887 is about 5038.7386318403. The cubic root of 25388887 is about 293.9101295644.

The spelling of 25388887 in words is "twenty-five million, three hundred eighty-eight thousand, eight hundred eighty-seven".