26397291 has 4 divisors (see below), whose sum is σ = 35196392. Its totient is φ = 17598192.

The previous prime is 26397271. The next prime is 26397299. The reversal of 26397291 is 19279362.

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

It is not a de Polignac number, because 26397291 - 2¹⁸ = 26135147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26397299) 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 in 3 ways as a sum of consecutive naturals, for example, 4399546 + ... + 4399551.

It is an arithmetic number, because the mean of its divisors is an integer number (8799098).

Almost surely, 2^26397291 is an apocalyptic number.

26397291 is a deficient number, since it is larger than the sum of its proper divisors (8799101).

26397291 is an equidigital number, since it uses as much as digits as its factorization.

26397291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8799100.

The product of its digits is 40824, while the sum is 39.

The square root of 26397291 is about 5137.8294054980. The cubic root of 26397291 is about 297.7509254589.

The spelling of 26397291 in words is "twenty-six million, three hundred ninety-seven thousand, two hundred ninety-one".