25685633 has 2 divisors, whose sum is σ = 25685634. Its totient is φ = 25685632.

The previous prime is 25685629. The next prime is 25685713. The reversal of 25685633 is 33658652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14348944 + 11336689 = 3788^2 + 3367^2 .

It is a cyclic number.

It is not a de Polignac number, because 25685633 - 2² = 25685629 is a prime.

It is a super-2 number, since 2×25685633² = 1319503485221378, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25685603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12842816 + 12842817.

It is an arithmetic number, because the mean of its divisors is an integer number (12842817).

Almost surely, 2^25685633 is an apocalyptic number.

It is an amenable number.

25685633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25685633 is an equidigital number, since it uses as much as digits as its factorization.

25685633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

The square root of 25685633 is about 5068.0995451944. The cubic root of 25685633 is about 295.0507736029.

The spelling of 25685633 in words is "twenty-five million, six hundred eighty-five thousand, six hundred thirty-three".