25817867 has 2 divisors, whose sum is σ = 25817868. Its totient is φ = 25817866.

The previous prime is 25817861. The next prime is 25817879. The reversal of 25817867 is 76871852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25817867 - 2⁴ = 25817851 is a prime.

It is not a weakly prime, because it can be changed into another prime (25817861) 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, 12908933 + 12908934.

It is an arithmetic number, because the mean of its divisors is an integer number (12908934).

Almost surely, 2^25817867 is an apocalyptic number.

25817867 is a deficient number, since it is larger than the sum of its proper divisors (1).

25817867 is an equidigital number, since it uses as much as digits as its factorization.

25817867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 44.

The square root of 25817867 is about 5081.1285163830. The cubic root of 25817867 is about 295.5562310261.

The spelling of 25817867 in words is "twenty-five million, eight hundred seventeen thousand, eight hundred sixty-seven".