26780791 has 2 divisors, whose sum is σ = 26780792. Its totient is φ = 26780790.

The previous prime is 26780783. The next prime is 26780801. The reversal of 26780791 is 19708762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26780791 - 2³ = 26780783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26780191) 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, 13390395 + 13390396.

It is an arithmetic number, because the mean of its divisors is an integer number (13390396).

Almost surely, 2^26780791 is an apocalyptic number.

26780791 is a deficient number, since it is larger than the sum of its proper divisors (1).

26780791 is an equidigital number, since it uses as much as digits as its factorization.

26780791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 26780791 is about 5175.0160386225. The cubic root of 26780791 is about 299.1859076586.

The spelling of 26780791 in words is "twenty-six million, seven hundred eighty thousand, seven hundred ninety-one".