26198243 has 2 divisors, whose sum is σ = 26198244. Its totient is φ = 26198242.

The previous prime is 26198239. The next prime is 26198267. The reversal of 26198243 is 34289162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26198243 - 2² = 26198239 is a prime.

It is a super-3 number, since 3×26198243³ (a number of 23 digits) contains 333 as substring.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (26998243) 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, 13099121 + 13099122.

It is an arithmetic number, because the mean of its divisors is an integer number (13099122).

Almost surely, 2^26198243 is an apocalyptic number.

26198243 is a deficient number, since it is larger than the sum of its proper divisors (1).

26198243 is an equidigital number, since it uses as much as digits as its factorization.

26198243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 26198243 is about 5118.4219247733. The cubic root of 26198243 is about 297.0006424123. Note that the first 3 decimals are identical.

The spelling of 26198243 in words is "twenty-six million, one hundred ninety-eight thousand, two hundred forty-three".