26780279 has 2 divisors, whose sum is σ = 26780280. Its totient is φ = 26780278.

The previous prime is 26780263. The next prime is 26780297. The reversal of 26780279 is 97208762.

Together with next prime (26780297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26780279 - 2⁴ = 26780263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26780239) 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, 13390139 + 13390140.

It is an arithmetic number, because the mean of its divisors is an integer number (13390140).

Almost surely, 2^26780279 is an apocalyptic number.

26780279 is a deficient number, since it is larger than the sum of its proper divisors (1).

26780279 is an equidigital number, since it uses as much as digits as its factorization.

26780279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 26780279 is about 5174.9665699403. The cubic root of 26780279 is about 299.1840010164.

The spelling of 26780279 in words is "twenty-six million, seven hundred eighty thousand, two hundred seventy-nine".