25868197 has 2 divisors, whose sum is σ = 25868198. Its totient is φ = 25868196.

The previous prime is 25868179. The next prime is 25868201. The reversal of 25868197 is 79186852.

Together with previous prime (25868179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20079361 + 5788836 = 4481^2 + 2406^2 .

It is a cyclic number.

It is not a de Polignac number, because 25868197 - 2¹⁵ = 25835429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25868147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12934098 + 12934099.

It is an arithmetic number, because the mean of its divisors is an integer number (12934099).

Almost surely, 2^25868197 is an apocalyptic number.

It is an amenable number.

25868197 is a deficient number, since it is larger than the sum of its proper divisors (1).

25868197 is an equidigital number, since it uses as much as digits as its factorization.

25868197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 25868197 is about 5086.0787449665. The cubic root of 25868197 is about 295.7481612817.

The spelling of 25868197 in words is "twenty-five million, eight hundred sixty-eight thousand, one hundred ninety-seven".