26811691 has 2 divisors, whose sum is σ = 26811692. Its totient is φ = 26811690.

The previous prime is 26811671. The next prime is 26811709. The reversal of 26811691 is 19611862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26811691 - 2⁹ = 26811179 is a prime.

It is not a weakly prime, because it can be changed into another prime (26811611) 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, 13405845 + 13405846.

It is an arithmetic number, because the mean of its divisors is an integer number (13405846).

Almost surely, 2^26811691 is an apocalyptic number.

26811691 is a deficient number, since it is larger than the sum of its proper divisors (1).

26811691 is an equidigital number, since it uses as much as digits as its factorization.

26811691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 26811691 is about 5178.0006759366. Note that the first 3 decimals coincide. The cubic root of 26811691 is about 299.3009315355.

The spelling of 26811691 in words is "twenty-six million, eight hundred eleven thousand, six hundred ninety-one".