25617017 has 2 divisors, whose sum is σ = 25617018. Its totient is φ = 25617016.

The previous prime is 25616957. The next prime is 25617019. The reversal of 25617017 is 71071652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 1371241 = 4924^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 25617017 - 2⁶ = 25616953 is a prime.

Together with 25617019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25617019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12808508 + 12808509.

It is an arithmetic number, because the mean of its divisors is an integer number (12808509).

Almost surely, 2^25617017 is an apocalyptic number.

It is an amenable number.

25617017 is a deficient number, since it is larger than the sum of its proper divisors (1).

25617017 is an equidigital number, since it uses as much as digits as its factorization.

25617017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 25617017 is about 5061.3256168715. The cubic root of 25617017 is about 294.7878087228.

Adding to 25617017 its reverse (71071652), we get a palindrome (96688669).

The spelling of 25617017 in words is "twenty-five million, six hundred seventeen thousand, seventeen".