26138887 has 2 divisors, whose sum is σ = 26138888. Its totient is φ = 26138886.

The previous prime is 26138873. The next prime is 26138897. The reversal of 26138887 is 78883162.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26138887 - 2¹¹ = 26136839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26138807) 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, 13069443 + 13069444.

It is an arithmetic number, because the mean of its divisors is an integer number (13069444).

Almost surely, 2^26138887 is an apocalyptic number.

26138887 is a deficient number, since it is larger than the sum of its proper divisors (1).

26138887 is an equidigital number, since it uses as much as digits as its factorization.

26138887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 26138887 is about 5112.6203653313. The cubic root of 26138887 is about 296.7761731550.

The spelling of 26138887 in words is "twenty-six million, one hundred thirty-eight thousand, eight hundred eighty-seven".