26988791 has 2 divisors, whose sum is σ = 26988792. Its totient is φ = 26988790.

The previous prime is 26988769. The next prime is 26988823. The reversal of 26988791 is 19788962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26988791 - 2²² = 22794487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26988761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13494395 + 13494396.

It is an arithmetic number, because the mean of its divisors is an integer number (13494396).

Almost surely, 2^26988791 is an apocalyptic number.

26988791 is a deficient number, since it is larger than the sum of its proper divisors (1).

26988791 is an equidigital number, since it uses as much as digits as its factorization.

26988791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 26988791 is about 5195.0737242122. The cubic root of 26988791 is about 299.9584794389.

The spelling of 26988791 in words is "twenty-six million, nine hundred eighty-eight thousand, seven hundred ninety-one".