208952819 has 4 divisors (see below), whose sum is σ = 209873544. Its totient is φ = 208032096.

The previous prime is 208952789. The next prime is 208952827. The reversal of 208952819 is 918259802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918259802 = 2 ⋅459129901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208952819 is a prime.

It is a super-2 number, since 2×208952819² = 87322561136093522, 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 208952819.

It is not an unprimeable number, because it can be changed into a prime (208952839) 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, 460022 + ... + 460475.

It is an arithmetic number, because the mean of its divisors is an integer number (52468386).

Almost surely, 2^208952819 is an apocalyptic number.

208952819 is a deficient number, since it is larger than the sum of its proper divisors (920725).

208952819 is an equidigital number, since it uses as much as digits as its factorization.

208952819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920724.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 208952819 is about 14455.2004136920. The cubic root of 208952819 is about 593.4025544863.

The spelling of 208952819 in words is "two hundred eight million, nine hundred fifty-two thousand, eight hundred nineteen".