25676689 has 2 divisors, whose sum is σ = 25676690. Its totient is φ = 25676688.

The previous prime is 25676627. The next prime is 25676713. The reversal of 25676689 is 98667652.

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., 24830289 + 846400 = 4983^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 25676689 - 2⁹ = 25676177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25676089) 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, 12838344 + 12838345.

It is an arithmetic number, because the mean of its divisors is an integer number (12838345).

Almost surely, 2^25676689 is an apocalyptic number.

It is an amenable number.

25676689 is a deficient number, since it is larger than the sum of its proper divisors (1).

25676689 is an equidigital number, since it uses as much as digits as its factorization.

25676689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 25676689 is about 5067.2170863305. The cubic root of 25676689 is about 295.0165230619.

The spelling of 25676689 in words is "twenty-five million, six hundred seventy-six thousand, six hundred eighty-nine".