26871289 has 2 divisors, whose sum is σ = 26871290. Its totient is φ = 26871288.

The previous prime is 26871281. The next prime is 26871319. The reversal of 26871289 is 98217862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23843689 + 3027600 = 4883^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 26871289 - 2³ = 26871281 is a prime.

It is not a weakly prime, because it can be changed into another prime (26871281) 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, 13435644 + 13435645.

It is an arithmetic number, because the mean of its divisors is an integer number (13435645).

Almost surely, 2^26871289 is an apocalyptic number.

It is an amenable number.

26871289 is a deficient number, since it is larger than the sum of its proper divisors (1).

26871289 is an equidigital number, since it uses as much as digits as its factorization.

26871289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 26871289 is about 5183.7524053527. The cubic root of 26871289 is about 299.5225330802.

The spelling of 26871289 in words is "twenty-six million, eight hundred seventy-one thousand, two hundred eighty-nine".