26897191 has 4 divisors (see below), whose sum is σ = 26985112. Its totient is φ = 26809272.

The previous prime is 26897183. The next prime is 26897201. The reversal of 26897191 is 19179862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26897191 - 2³ = 26897183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26897131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43500 + ... + 44113.

It is an arithmetic number, because the mean of its divisors is an integer number (6746278).

Almost surely, 2^26897191 is an apocalyptic number.

26897191 is a deficient number, since it is larger than the sum of its proper divisors (87921).

26897191 is an equidigital number, since it uses as much as digits as its factorization.

26897191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87920.

The product of its digits is 54432, while the sum is 43.

The square root of 26897191 is about 5186.2501867920. The cubic root of 26897191 is about 299.6187416046.

The spelling of 26897191 in words is "twenty-six million, eight hundred ninety-seven thousand, one hundred ninety-one".