26790857 has 2 divisors, whose sum is σ = 26790858. Its totient is φ = 26790856.

The previous prime is 26790839. The next prime is 26790871. The reversal of 26790857 is 75809762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24492601 + 2298256 = 4949^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 26790857 - 2¹² = 26786761 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26790877) 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, 13395428 + 13395429.

It is an arithmetic number, because the mean of its divisors is an integer number (13395429).

Almost surely, 2^26790857 is an apocalyptic number.

It is an amenable number.

26790857 is a deficient number, since it is larger than the sum of its proper divisors (1).

26790857 is an equidigital number, since it uses as much as digits as its factorization.

26790857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 26790857 is about 5175.9885046240. The cubic root of 26790857 is about 299.2233876084.

The spelling of 26790857 in words is "twenty-six million, seven hundred ninety thousand, eight hundred fifty-seven".