26199997 has 2 divisors, whose sum is σ = 26199998.
Its totient is φ = 26199996.
The previous prime is 26199989. The next prime is 26200001. The reversal of 26199997 is 79999162.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 25462116 + 737881 = 5046^2 + 859^2
It is a cyclic number.
It is not a de Polignac number, because 26199997 - 23 = 26199989 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (26199937) 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, 13099998 + 13099999.
It is an arithmetic number, because the mean of its divisors is an integer number (13099999).
Almost surely, 226199997 is an apocalyptic number.
It is an amenable number.
26199997 is a deficient number, since it is larger than the sum of its proper divisors (1).
26199997 is an equidigital number, since it uses as much as digits as its factorization.
26199997 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 551124, while the sum is 52.
The square root of 26199997 is about 5118.5932637786.
The cubic root of 26199997 is about 297.0072704331.
The spelling of 26199997 in words is "twenty-six million, one hundred ninety-nine thousand, nine hundred ninety-seven".