26890247 has 2 divisors, whose sum is σ = 26890248. Its totient is φ = 26890246.

The previous prime is 26890229. The next prime is 26890261. The reversal of 26890247 is 74209862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26890247 - 2⁶ = 26890183 is a prime.

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 26890247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26890267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445123 + 13445124.

It is an arithmetic number, because the mean of its divisors is an integer number (13445124).

Almost surely, 2^26890247 is an apocalyptic number.

26890247 is a deficient number, since it is larger than the sum of its proper divisors (1).

26890247 is an equidigital number, since it uses as much as digits as its factorization.

26890247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 26890247 is about 5185.5806810810. The cubic root of 26890247 is about 299.5929553728.

The spelling of 26890247 in words is "twenty-six million, eight hundred ninety thousand, two hundred forty-seven".