209423841 has 8 divisors (see below), whose sum is σ = 304616544. Its totient is φ = 126923520.

The previous prime is 209423783. The next prime is 209423887. The reversal of 209423841 is 148324902.

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

It is not a de Polignac number, because 209423841 - 2⁹ = 209423329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 6346177 = 209423841 / (2 + 0 + 9 + 4 + 2 + 3 + 8 + 4 + 1).

It is not an unprimeable number, because it can be changed into a prime (209423041) 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, 3173056 + ... + 3173121.

It is an arithmetic number, because the mean of its divisors is an integer number (38077068).

Almost surely, 2^209423841 is an apocalyptic number.

It is an amenable number.

209423841 is a deficient number, since it is larger than the sum of its proper divisors (95192703).

209423841 is a wasteful number, since it uses less digits than its factorization.

209423841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6346191.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 209423841 is about 14471.4837179883. The cubic root of 209423841 is about 593.8481030734.

The spelling of 209423841 in words is "two hundred nine million, four hundred twenty-three thousand, eight hundred forty-one".