26006809 has 2 divisors, whose sum is σ = 26006810. Its totient is φ = 26006808.

The previous prime is 26006807. The next prime is 26006899. The reversal of 26006809 is 90860062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 1056784 = 4995^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 26006809 - 2¹ = 26006807 is a prime.

It is a super-2 number, since 2×26006809² = 1352708228724962, which contains 22 as substring.

Together with 26006807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26006807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13003404 + 13003405.

It is an arithmetic number, because the mean of its divisors is an integer number (13003405).

Almost surely, 2^26006809 is an apocalyptic number.

It is an amenable number.

26006809 is a deficient number, since it is larger than the sum of its proper divisors (1).

26006809 is an equidigital number, since it uses as much as digits as its factorization.

26006809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 26006809 is about 5099.6871472670. The cubic root of 26006809 is about 296.2754656550.

It can be divided in two parts, 2600 and 6809, that added together give a square (9409 = 97²).

The spelling of 26006809 in words is "twenty-six million, six thousand, eight hundred nine".