26889287 has 2 divisors, whose sum is σ = 26889288. Its totient is φ = 26889286.

The previous prime is 26889271. The next prime is 26889299. The reversal of 26889287 is 78298862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26889287 - 2⁴ = 26889271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26889587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13444643 + 13444644.

It is an arithmetic number, because the mean of its divisors is an integer number (13444644).

Almost surely, 2^26889287 is an apocalyptic number.

26889287 is a deficient number, since it is larger than the sum of its proper divisors (1).

26889287 is an equidigital number, since it uses as much as digits as its factorization.

26889287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 50.

The square root of 26889287 is about 5185.4881158865. The cubic root of 26889287 is about 299.5893901066.

The spelling of 26889287 in words is "twenty-six million, eight hundred eighty-nine thousand, two hundred eighty-seven".