25608929 has 2 divisors, whose sum is σ = 25608930. Its totient is φ = 25608928.

The previous prime is 25608917. The next prime is 25608931. The reversal of 25608929 is 92980652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 5329 = 5060^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 25608929 - 2¹² = 25604833 is a prime.

Together with 25608931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25608229) 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, 12804464 + 12804465.

It is an arithmetic number, because the mean of its divisors is an integer number (12804465).

Almost surely, 2^25608929 is an apocalyptic number.

It is an amenable number.

25608929 is a deficient number, since it is larger than the sum of its proper divisors (1).

25608929 is an equidigital number, since it uses as much as digits as its factorization.

25608929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 25608929 is about 5060.5265536306. The cubic root of 25608929 is about 294.7567812387.

The spelling of 25608929 in words is "twenty-five million, six hundred eight thousand, nine hundred twenty-nine".