25697167 has 2 divisors, whose sum is σ = 25697168. Its totient is φ = 25697166.

The previous prime is 25697153. The next prime is 25697239. The reversal of 25697167 is 76179652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25697167 - 2⁷ = 25697039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25697117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12848583 + 12848584.

It is an arithmetic number, because the mean of its divisors is an integer number (12848584).

Almost surely, 2^25697167 is an apocalyptic number.

25697167 is a deficient number, since it is larger than the sum of its proper divisors (1).

25697167 is an equidigital number, since it uses as much as digits as its factorization.

25697167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 25697167 is about 5069.2373193608. The cubic root of 25697167 is about 295.0949306662.

The spelling of 25697167 in words is "twenty-five million, six hundred ninety-seven thousand, one hundred sixty-seven".