26315617 has 2 divisors, whose sum is σ = 26315618. Its totient is φ = 26315616.

The previous prime is 26315603. The next prime is 26315633. The reversal of 26315617 is 71651362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14371681 + 11943936 = 3791^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 26315617 - 2¹⁵ = 26282849 is a prime.

It is not a weakly prime, because it can be changed into another prime (26315017) 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, 13157808 + 13157809.

It is an arithmetic number, because the mean of its divisors is an integer number (13157809).

Almost surely, 2^26315617 is an apocalyptic number.

It is an amenable number.

26315617 is a deficient number, since it is larger than the sum of its proper divisors (1).

26315617 is an equidigital number, since it uses as much as digits as its factorization.

26315617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 26315617 is about 5129.8749497429. The cubic root of 26315617 is about 297.4435248117.

Adding to 26315617 its reverse (71651362), we get a palindrome (97966979).

The spelling of 26315617 in words is "twenty-six million, three hundred fifteen thousand, six hundred seventeen".