26765891 has 2 divisors, whose sum is σ = 26765892. Its totient is φ = 26765890.

The previous prime is 26765867. The next prime is 26765899. The reversal of 26765891 is 19856762.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26765891 is a prime.

It is not a weakly prime, because it can be changed into another prime (26765899) 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, 13382945 + 13382946.

It is an arithmetic number, because the mean of its divisors is an integer number (13382946).

Almost surely, 2^26765891 is an apocalyptic number.

26765891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26765891 is an equidigital number, since it uses as much as digits as its factorization.

26765891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 26765891 is about 5173.5762292635. The cubic root of 26765891 is about 299.1304114509.

The spelling of 26765891 in words is "twenty-six million, seven hundred sixty-five thousand, eight hundred ninety-one".