26949217 has 2 divisors, whose sum is σ = 26949218. Its totient is φ = 26949216.

The previous prime is 26949211. The next prime is 26949287. The reversal of 26949217 is 71294962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 8767521 = 4264^2 + 2961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26949217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26949217.

It is not a weakly prime, because it can be changed into another prime (26949211) 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, 13474608 + 13474609.

It is an arithmetic number, because the mean of its divisors is an integer number (13474609).

Almost surely, 2^26949217 is an apocalyptic number.

It is an amenable number.

26949217 is a deficient number, since it is larger than the sum of its proper divisors (1).

26949217 is an equidigital number, since it uses as much as digits as its factorization.

26949217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 26949217 is about 5191.2635263489. The cubic root of 26949217 is about 299.8117967713.

It can be divided in two parts, 2694 and 9217, that added together give a palindrome (11911).

The spelling of 26949217 in words is "twenty-six million, nine hundred forty-nine thousand, two hundred seventeen".