26890559 has 2 divisors, whose sum is σ = 26890560. Its totient is φ = 26890558.

The previous prime is 26890553. The next prime is 26890571. The reversal of 26890559 is 95509862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26890559 - 2¹⁶ = 26825023 is a prime.

It is a super-3 number, since 3×26890559³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26890553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445279 + 13445280.

It is an arithmetic number, because the mean of its divisors is an integer number (13445280).

Almost surely, 2^26890559 is an apocalyptic number.

26890559 is a deficient number, since it is larger than the sum of its proper divisors (1).

26890559 is an equidigital number, since it uses as much as digits as its factorization.

26890559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 26890559 is about 5185.6107644134. The cubic root of 26890559 is about 299.5941140660.

The spelling of 26890559 in words is "twenty-six million, eight hundred ninety thousand, five hundred fifty-nine".