26628191 has 2 divisors, whose sum is σ = 26628192. Its totient is φ = 26628190.

The previous prime is 26628187. The next prime is 26628241. The reversal of 26628191 is 19182662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26628191 - 2² = 26628187 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26628491) 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, 13314095 + 13314096.

It is an arithmetic number, because the mean of its divisors is an integer number (13314096).

Almost surely, 2^26628191 is an apocalyptic number.

26628191 is a deficient number, since it is larger than the sum of its proper divisors (1).

26628191 is an equidigital number, since it uses as much as digits as its factorization.

26628191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 26628191 is about 5160.2510597838. The cubic root of 26628191 is about 298.6165597464.

The spelling of 26628191 in words is "twenty-six million, six hundred twenty-eight thousand, one hundred ninety-one".