25685629 has 2 divisors, whose sum is σ = 25685630. Its totient is φ = 25685628.

The previous prime is 25685617. The next prime is 25685633. The reversal of 25685629 is 92658652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 8421604 = 4155^2 + 2902^2 .

It is a cyclic number.

It is not a de Polignac number, because 25685629 - 2⁷ = 25685501 is a prime.

It is a super-3 number, since 3×25685629³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25683629) 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, 12842814 + 12842815.

It is an arithmetic number, because the mean of its divisors is an integer number (12842815).

Almost surely, 2^25685629 is an apocalyptic number.

It is an amenable number.

25685629 is a deficient number, since it is larger than the sum of its proper divisors (1).

25685629 is an equidigital number, since it uses as much as digits as its factorization.

25685629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 43.

The square root of 25685629 is about 5068.0991505692. The cubic root of 25685629 is about 295.0507582869.

The spelling of 25685629 in words is "twenty-five million, six hundred eighty-five thousand, six hundred twenty-nine".