25863559 has 2 divisors, whose sum is σ = 25863560. Its totient is φ = 25863558.

The previous prime is 25863557. The next prime is 25863571. The reversal of 25863559 is 95536852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25863559 - 2¹ = 25863557 is a prime.

Together with 25863557, 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 (25863557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12931779 + 12931780.

It is an arithmetic number, because the mean of its divisors is an integer number (12931780).

Almost surely, 2^25863559 is an apocalyptic number.

25863559 is a deficient number, since it is larger than the sum of its proper divisors (1).

25863559 is an equidigital number, since it uses as much as digits as its factorization.

25863559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 43.

The square root of 25863559 is about 5085.6227740563. The cubic root of 25863559 is about 295.7304849827.

The spelling of 25863559 in words is "twenty-five million, eight hundred sixty-three thousand, five hundred fifty-nine".