25677643 has 2 divisors, whose sum is σ = 25677644. Its totient is φ = 25677642.

The previous prime is 25677611. The next prime is 25677649. The reversal of 25677643 is 34677652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25677643 - 2⁵ = 25677611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25677596 and 25677605.

It is not a weakly prime, because it can be changed into another prime (25677649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838821 + 12838822.

It is an arithmetic number, because the mean of its divisors is an integer number (12838822).

Almost surely, 2^25677643 is an apocalyptic number.

25677643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25677643 is an equidigital number, since it uses as much as digits as its factorization.

25677643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 40.

The square root of 25677643 is about 5067.3112199667. The cubic root of 25677643 is about 295.0201767297.

Subtracting 25677643 from its reverse (34677652), we obtain a palindrome (9000009).

The spelling of 25677643 in words is "twenty-five million, six hundred seventy-seven thousand, six hundred forty-three".