25867397 has 2 divisors, whose sum is σ = 25867398. Its totient is φ = 25867396.

The previous prime is 25867367. The next prime is 25867409. The reversal of 25867397 is 79376852.

It is a Cunningham number, because it is equal to 5086²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25867396 + 1 = 5086^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 25867397 - 2¹⁶ = 25801861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25867337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12933698 + 12933699.

It is an arithmetic number, because the mean of its divisors is an integer number (12933699).

Almost surely, 2^25867397 is an apocalyptic number.

It is an amenable number.

25867397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25867397 is an equidigital number, since it uses as much as digits as its factorization.

25867397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 47.

The square root of 25867397 is about 5086.0000983091. Note that the first 4 decimals coincide. The cubic root of 25867397 is about 295.7451124806.

The spelling of 25867397 in words is "twenty-five million, eight hundred sixty-seven thousand, three hundred ninety-seven".