25613633 has 2 divisors, whose sum is σ = 25613634. Its totient is φ = 25613632.

The previous prime is 25613603. The next prime is 25613639. The reversal of 25613633 is 33631652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22733824 + 2879809 = 4768^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 25613633 - 2⁶ = 25613569 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25613596 and 25613605.

It is not a weakly prime, because it can be changed into another prime (25613639) 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, 12806816 + 12806817.

It is an arithmetic number, because the mean of its divisors is an integer number (12806817).

Almost surely, 2^25613633 is an apocalyptic number.

It is an amenable number.

25613633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25613633 is an equidigital number, since it uses as much as digits as its factorization.

25613633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 29.

The square root of 25613633 is about 5060.9913060585. The cubic root of 25613633 is about 294.7748276918.

The spelling of 25613633 in words is "twenty-five million, six hundred thirteen thousand, six hundred thirty-three".