26285813 has 2 divisors, whose sum is σ = 26285814. Its totient is φ = 26285812.

The previous prime is 26285801. The next prime is 26285821. The reversal of 26285813 is 31858262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 813604 = 5047^2 + 902^2 .

It is a cyclic number.

It is not a de Polignac number, because 26285813 - 2¹⁰ = 26284789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26285713) 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, 13142906 + 13142907.

It is an arithmetic number, because the mean of its divisors is an integer number (13142907).

Almost surely, 2^26285813 is an apocalyptic number.

It is an amenable number.

26285813 is a deficient number, since it is larger than the sum of its proper divisors (1).

26285813 is an equidigital number, since it uses as much as digits as its factorization.

26285813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 26285813 is about 5126.9691826653. The cubic root of 26285813 is about 297.3311915707.

The spelling of 26285813 in words is "twenty-six million, two hundred eighty-five thousand, eight hundred thirteen".