26638291 has 2 divisors, whose sum is σ = 26638292. Its totient is φ = 26638290.

The previous prime is 26638289. The next prime is 26638319. The reversal of 26638291 is 19283662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26638291 - 2¹ = 26638289 is a prime.

Together with 26638289, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 26638291.

It is not a weakly prime, because it can be changed into another prime (26638091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13319145 + 13319146.

It is an arithmetic number, because the mean of its divisors is an integer number (13319146).

Almost surely, 2^26638291 is an apocalyptic number.

26638291 is a deficient number, since it is larger than the sum of its proper divisors (1).

26638291 is an equidigital number, since it uses as much as digits as its factorization.

26638291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 26638291 is about 5161.2296015581. The cubic root of 26638291 is about 298.6543097887.

The spelling of 26638291 in words is "twenty-six million, six hundred thirty-eight thousand, two hundred ninety-one".