208394867 has 4 divisors (see below), whose sum is σ = 208735440. Its totient is φ = 208054296.

The previous prime is 208394863. The next prime is 208394909. The reversal of 208394867 is 768493802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 208394867 - 2² = 208394863 is a prime.

It is a super-4 number, since 4×208394867⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208394861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169367 + ... + 170592.

It is an arithmetic number, because the mean of its divisors is an integer number (52183860).

Almost surely, 2^208394867 is an apocalyptic number.

208394867 is a deficient number, since it is larger than the sum of its proper divisors (340573).

208394867 is an equidigital number, since it uses as much as digits as its factorization.

208394867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340572.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 208394867 is about 14435.8881611074. Note that the first 3 decimals coincide. The cubic root of 208394867 is about 592.8739099862.

The spelling of 208394867 in words is "two hundred eight million, three hundred ninety-four thousand, eight hundred sixty-seven".