25163917 has 2 divisors, whose sum is σ = 25163918. Its totient is φ = 25163916.

The previous prime is 25163881. The next prime is 25163951. The reversal of 25163917 is 71936152.

It is an a-pointer prime, because the next prime (25163951) can be obtained adding 25163917 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23677956 + 1485961 = 4866^2 + 1219^2 .

It is a cyclic number.

It is not a de Polignac number, because 25163917 - 2¹¹ = 25161869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25163977) 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, 12581958 + 12581959.

It is an arithmetic number, because the mean of its divisors is an integer number (12581959).

Almost surely, 2^25163917 is an apocalyptic number.

It is an amenable number.

25163917 is a deficient number, since it is larger than the sum of its proper divisors (1).

25163917 is an equidigital number, since it uses as much as digits as its factorization.

25163917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 25163917 is about 5016.3649189428. The cubic root of 25163917 is about 293.0394438001.

The spelling of 25163917 in words is "twenty-five million, one hundred sixty-three thousand, nine hundred seventeen".