208327993 has 8 divisors (see below), whose sum is σ = 211982216. Its totient is φ = 204681600.

The previous prime is 208327969. The next prime is 208328023. The reversal of 208327993 is 399723802.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7907344 + 200420649 = 2812^2 + 14157^2 .

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 208327993 - 2⁵ = 208327961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208327963) 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, 83005 + ... + 85477.

It is an arithmetic number, because the mean of its divisors is an integer number (26497777).

Almost surely, 2^208327993 is an apocalyptic number.

It is an amenable number.

208327993 is a deficient number, since it is larger than the sum of its proper divisors (3654223).

208327993 is a wasteful number, since it uses less digits than its factorization.

208327993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 208327993 is about 14433.5717339819. The cubic root of 208327993 is about 592.8104853728.

The spelling of 208327993 in words is "two hundred eight million, three hundred twenty-seven thousand, nine hundred ninety-three".