209338381 has 8 divisors (see below), whose sum is σ = 246961664. Its totient is φ = 173644560.

The previous prime is 209338369. The next prime is 209338399. The reversal of 209338381 is 183833902.

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 209338381 - 2⁷ = 209338253 is a prime.

It is a super-2 number, since 2×209338381² = 87645115519402322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209338381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209338361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482130 + ... + 482563.

It is an arithmetic number, because the mean of its divisors is an integer number (30870208).

Almost surely, 2^209338381 is an apocalyptic number.

It is an amenable number.

209338381 is a deficient number, since it is larger than the sum of its proper divisors (37623283).

209338381 is an equidigital number, since it uses as much as digits as its factorization.

209338381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964731.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 209338381 is about 14468.5307132411. The cubic root of 209338381 is about 593.7673144942.

The spelling of 209338381 in words is "two hundred nine million, three hundred thirty-eight thousand, three hundred eighty-one".