25949563 has 2 divisors, whose sum is σ = 25949564. Its totient is φ = 25949562.

The previous prime is 25949549. The next prime is 25949579. The reversal of 25949563 is 36594952.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25949563 is a prime.

It is not a weakly prime, because it can be changed into another prime (25949503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12974781 + 12974782.

It is an arithmetic number, because the mean of its divisors is an integer number (12974782).

Almost surely, 2^25949563 is an apocalyptic number.

25949563 is a deficient number, since it is larger than the sum of its proper divisors (1).

25949563 is an equidigital number, since it uses as much as digits as its factorization.

25949563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The square root of 25949563 is about 5094.0713579611. The cubic root of 25949563 is about 296.0579194853.

The spelling of 25949563 in words is "twenty-five million, nine hundred forty-nine thousand, five hundred sixty-three".