25907197 has 2 divisors, whose sum is σ = 25907198. Its totient is φ = 25907196.

The previous prime is 25907191. The next prime is 25907209. The reversal of 25907197 is 79170952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21288996 + 4618201 = 4614^2 + 2149^2 .

It is a cyclic number.

It is not a de Polignac number, because 25907197 - 2⁷ = 25907069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25907191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12953598 + 12953599.

It is an arithmetic number, because the mean of its divisors is an integer number (12953599).

Almost surely, 2^25907197 is an apocalyptic number.

It is an amenable number.

25907197 is a deficient number, since it is larger than the sum of its proper divisors (1).

25907197 is an equidigital number, since it uses as much as digits as its factorization.

25907197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 25907197 is about 5089.9112958872. The cubic root of 25907197 is about 295.8967141768.

The spelling of 25907197 in words is "twenty-five million, nine hundred seven thousand, one hundred ninety-seven".