42000326209 has 2 divisors, whose sum is σ = 42000326210. Its totient is φ = 42000326208.

The previous prime is 42000326143. The next prime is 42000326231. The reversal of 42000326209 is 90262300024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39307027600 + 2693298609 = 198260^2 + 51897^2 .

It is a cyclic number.

It is not a de Polignac number, because 42000326209 - 2¹¹ = 42000324161 is a prime.

It is not a weakly prime, because it can be changed into another prime (42000324209) 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, 21000163104 + 21000163105.

It is an arithmetic number, because the mean of its divisors is an integer number (21000163105).

Almost surely, 2^42000326209 is an apocalyptic number.

It is an amenable number.

42000326209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42000326209 is an equidigital number, since it uses as much as digits as its factorization.

42000326209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 42000326209 in words is "forty-two billion, three hundred twenty-six thousand, two hundred nine".