26405279 has 2 divisors, whose sum is σ = 26405280. Its totient is φ = 26405278.

The previous prime is 26405261. The next prime is 26405297. The reversal of 26405279 is 97250462.

Together with next prime (26405297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (26405261) and next prime (26405297).

It is a cyclic number.

It is not a de Polignac number, because 26405279 - 2²⁰ = 25356703 is a prime.

It is a Chen prime.

It is equal to p_1648259 and since 26405279 and 1648259 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26405179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13202639 + 13202640.

It is an arithmetic number, because the mean of its divisors is an integer number (13202640).

Almost surely, 2^26405279 is an apocalyptic number.

26405279 is a deficient number, since it is larger than the sum of its proper divisors (1).

26405279 is an equidigital number, since it uses as much as digits as its factorization.

26405279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 26405279 is about 5138.6067177787. The cubic root of 26405279 is about 297.7809562491.

It can be divided in two parts, 2640 and 5279, that multiplied together give a triangular number (13936560 = T₅₂₇₉).

The spelling of 26405279 in words is "twenty-six million, four hundred five thousand, two hundred seventy-nine".