26983391 has 2 divisors, whose sum is σ = 26983392. Its totient is φ = 26983390.

The previous prime is 26983387. The next prime is 26983399. The reversal of 26983391 is 19338962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26983391 - 2² = 26983387 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26983399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13491695 + 13491696.

It is an arithmetic number, because the mean of its divisors is an integer number (13491696).

Almost surely, 2^26983391 is an apocalyptic number.

26983391 is a deficient number, since it is larger than the sum of its proper divisors (1).

26983391 is an equidigital number, since it uses as much as digits as its factorization.

26983391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 26983391 is about 5194.5539750781. The cubic root of 26983391 is about 299.9384725673.

The spelling of 26983391 in words is "twenty-six million, nine hundred eighty-three thousand, three hundred ninety-one".