26440243 has 2 divisors, whose sum is σ = 26440244. Its totient is φ = 26440242.

The previous prime is 26440217. The next prime is 26440247. The reversal of 26440243 is 34204462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26440243 is a prime.

It is not a weakly prime, because it can be changed into another prime (26440247) 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, 13220121 + 13220122.

It is an arithmetic number, because the mean of its divisors is an integer number (13220122).

Almost surely, 2^26440243 is an apocalyptic number.

26440243 is a deficient number, since it is larger than the sum of its proper divisors (1).

26440243 is an equidigital number, since it uses as much as digits as its factorization.

26440243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 26440243 is about 5142.0076818301. The cubic root of 26440243 is about 297.9123317630.

The spelling of 26440243 in words is "twenty-six million, four hundred forty thousand, two hundred forty-three".