26878769 has 2 divisors, whose sum is σ = 26878770. Its totient is φ = 26878768.

The previous prime is 26878759. The next prime is 26878793. The reversal of 26878769 is 96787862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26388769 + 490000 = 5137^2 + 700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26878769 is a prime.

It is a super-2 number, since 2×26878769² = 1444936445910722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26878769.

It is not a weakly prime, because it can be changed into another prime (26878729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13439384 + 13439385.

It is an arithmetic number, because the mean of its divisors is an integer number (13439385).

Almost surely, 2^26878769 is an apocalyptic number.

It is an amenable number.

26878769 is a deficient number, since it is larger than the sum of its proper divisors (1).

26878769 is an equidigital number, since it uses as much as digits as its factorization.

26878769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 53.

The square root of 26878769 is about 5184.4738402272. The cubic root of 26878769 is about 299.5503226005.

The spelling of 26878769 in words is "twenty-six million, eight hundred seventy-eight thousand, seven hundred sixty-nine".