26808247 has 2 divisors, whose sum is σ = 26808248. Its totient is φ = 26808246.

The previous prime is 26808227. The next prime is 26808263. The reversal of 26808247 is 74280862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26808247 is a prime.

It is a super-3 number, since 3×26808247³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26808217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13404123 + 13404124.

It is an arithmetic number, because the mean of its divisors is an integer number (13404124).

Almost surely, 2^26808247 is an apocalyptic number.

26808247 is a deficient number, since it is larger than the sum of its proper divisors (1).

26808247 is an equidigital number, since it uses as much as digits as its factorization.

26808247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 26808247 is about 5177.6681044656. The cubic root of 26808247 is about 299.2881157761.

The spelling of 26808247 in words is "twenty-six million, eight hundred eight thousand, two hundred forty-seven".