26197859 has 2 divisors, whose sum is σ = 26197860. Its totient is φ = 26197858.

The previous prime is 26197837. The next prime is 26197861. The reversal of 26197859 is 95879162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26197859 - 2¹² = 26193763 is a prime.

Together with 26197861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26197819) 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, 13098929 + 13098930.

It is an arithmetic number, because the mean of its divisors is an integer number (13098930).

Almost surely, 2^26197859 is an apocalyptic number.

26197859 is a deficient number, since it is larger than the sum of its proper divisors (1).

26197859 is an equidigital number, since it uses as much as digits as its factorization.

26197859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 26197859 is about 5118.3844130741. The cubic root of 26197859 is about 296.9991913124. Note that the first 3 decimals are identical.

The spelling of 26197859 in words is "twenty-six million, one hundred ninety-seven thousand, eight hundred fifty-nine".