26813609 has 2 divisors, whose sum is σ = 26813610. Its totient is φ = 26813608.

The previous prime is 26813599. The next prime is 26813629. The reversal of 26813609 is 90631862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25050025 + 1763584 = 5005^2 + 1328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26813609 is a prime.

It is not a weakly prime, because it can be changed into another prime (26813629) 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, 13406804 + 13406805.

It is an arithmetic number, because the mean of its divisors is an integer number (13406805).

Almost surely, 2^26813609 is an apocalyptic number.

It is an amenable number.

26813609 is a deficient number, since it is larger than the sum of its proper divisors (1).

26813609 is an equidigital number, since it uses as much as digits as its factorization.

26813609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 26813609 is about 5178.1858792438. The cubic root of 26813609 is about 299.3080682916.

The spelling of 26813609 in words is "twenty-six million, eight hundred thirteen thousand, six hundred nine".