42368209 has 8 divisors (see below), whose sum is σ = 45962280. Its totient is φ = 38822016.

The previous prime is 42368203. The next prime is 42368239. The reversal of 42368209 is 90286324.

42368209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 42185025 = 428^2 + 6495^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42368209 - 2²³ = 33979601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42368203) 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 in 7 ways as a sum of consecutive naturals, for example, 10114 + ... + 13675.

It is an arithmetic number, because the mean of its divisors is an integer number (5745285).

Almost surely, 2^42368209 is an apocalyptic number.

It is an amenable number.

42368209 is a deficient number, since it is larger than the sum of its proper divisors (3594071).

42368209 is a wasteful number, since it uses less digits than its factorization.

42368209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23939.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 42368209 is about 6509.0866486781. The cubic root of 42368209 is about 348.6155074647.

The spelling of 42368209 in words is "forty-two million, three hundred sixty-eight thousand, two hundred nine".