26797409 has 2 divisors, whose sum is σ = 26797410. Its totient is φ = 26797408.

The previous prime is 26797403. The next prime is 26797411. The reversal of 26797409 is 90479762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24285184 + 2512225 = 4928^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 26797409 - 2²⁴ = 10020193 is a prime.

It is a super-2 number, since 2×26797409² = 1436202258226562, which contains 22 as substring.

Together with 26797411, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26797409.

It is not a weakly prime, because it can be changed into another prime (26797403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13398704 + 13398705.

It is an arithmetic number, because the mean of its divisors is an integer number (13398705).

Almost surely, 2^26797409 is an apocalyptic number.

It is an amenable number.

26797409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26797409 is an equidigital number, since it uses as much as digits as its factorization.

26797409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 26797409 is about 5176.6213885120. The cubic root of 26797409 is about 299.2477784150.

The spelling of 26797409 in words is "twenty-six million, seven hundred ninety-seven thousand, four hundred nine".