842235209 has 8 divisors (see below), whose sum is σ = 849775872. Its totient is φ = 834727680.

The previous prime is 842235193. The next prime is 842235221. The reversal of 842235209 is 902532248.

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 842235209 - 2⁴ = 842235193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (842235259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44252 + ... + 60354.

It is an arithmetic number, because the mean of its divisors is an integer number (106221984).

Almost surely, 2^842235209 is an apocalyptic number.

It is an amenable number.

842235209 is a deficient number, since it is larger than the sum of its proper divisors (7540663).

842235209 is a wasteful number, since it uses less digits than its factorization.

842235209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16567.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 842235209 is about 29021.2888928111. The cubic root of 842235209 is about 944.3749621374.

The spelling of 842235209 in words is "eight hundred forty-two million, two hundred thirty-five thousand, two hundred nine".