25675649 has 2 divisors, whose sum is σ = 25675650. Its totient is φ = 25675648.

The previous prime is 25675619. The next prime is 25675651. The reversal of 25675649 is 94657652.

25675649 is nontrivially palindromic in base 16.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 102400 = 5057^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 25675649 - 2¹² = 25671553 is a prime.

Together with 25675651, 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 (25675619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12837824 + 12837825.

It is an arithmetic number, because the mean of its divisors is an integer number (12837825).

Almost surely, 2^25675649 is an apocalyptic number.

It is an amenable number.

25675649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25675649 is an equidigital number, since it uses as much as digits as its factorization.

25675649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 25675649 is about 5067.1144648606. The cubic root of 25675649 is about 295.0125399247.

The spelling of 25675649 in words is "twenty-five million, six hundred seventy-five thousand, six hundred forty-nine".