26998243 has 2 divisors, whose sum is σ = 26998244. Its totient is φ = 26998242.

The previous prime is 26998229. The next prime is 26998249. The reversal of 26998243 is 34289962.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26998243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26998243.

It is not a weakly prime, because it can be changed into another prime (26998249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13499121 + 13499122.

It is an arithmetic number, because the mean of its divisors is an integer number (13499122).

Almost surely, 2^26998243 is an apocalyptic number.

26998243 is a deficient number, since it is larger than the sum of its proper divisors (1).

26998243 is an equidigital number, since it uses as much as digits as its factorization.

26998243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 26998243 is about 5195.9833525522. The cubic root of 26998243 is about 299.9934924514.

The spelling of 26998243 in words is "twenty-six million, nine hundred ninety-eight thousand, two hundred forty-three".