26816969 has 2 divisors, whose sum is σ = 26816970. Its totient is φ = 26816968.

The previous prime is 26816963. The next prime is 26816981. The reversal of 26816969 is 96961862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17330569 + 9486400 = 4163^2 + 3080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26816969 is a prime.

It is a super-2 number, since 2×26816969² = 1438299652693922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26816963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13408484 + 13408485.

It is an arithmetic number, because the mean of its divisors is an integer number (13408485).

Almost surely, 2^26816969 is an apocalyptic number.

It is an amenable number.

26816969 is a deficient number, since it is larger than the sum of its proper divisors (1).

26816969 is an equidigital number, since it uses as much as digits as its factorization.

26816969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 26816969 is about 5178.5103070285. The cubic root of 26816969 is about 299.3205698178.

The spelling of 26816969 in words is "twenty-six million, eight hundred sixteen thousand, nine hundred sixty-nine".