25387279 has 2 divisors, whose sum is σ = 25387280. Its totient is φ = 25387278.

The previous prime is 25387277. The next prime is 25387319. The reversal of 25387279 is 97278352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25387279 - 2¹ = 25387277 is a prime.

Together with 25387277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25387277) 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, 12693639 + 12693640.

It is an arithmetic number, because the mean of its divisors is an integer number (12693640).

Almost surely, 2^25387279 is an apocalyptic number.

25387279 is a deficient number, since it is larger than the sum of its proper divisors (1).

25387279 is an equidigital number, since it uses as much as digits as its factorization.

25387279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 25387279 is about 5038.5790655700. The cubic root of 25387279 is about 293.9039245206.

The spelling of 25387279 in words is "twenty-five million, three hundred eighty-seven thousand, two hundred seventy-nine".