819827205 has 16 divisors (see below), whose sum is σ = 1316465664. Its totient is φ = 435660480.

The previous prime is 819827189. The next prime is 819827221. The reversal of 819827205 is 502728918.

It is an interprime number because it is at equal distance from previous prime (819827189) and next prime (819827221).

It is not a de Polignac number, because 819827205 - 2⁴ = 819827189 is a prime.

It is a super-2 number, since 2×819827205² = 1344233292116224050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94501 + ... + 102810.

It is an arithmetic number, because the mean of its divisors is an integer number (82279104).

Almost surely, 2^819827205 is an apocalyptic number.

It is an amenable number.

819827205 is a deficient number, since it is larger than the sum of its proper divisors (496638459).

819827205 is a wasteful number, since it uses less digits than its factorization.

819827205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197596.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 819827205 is about 28632.6248360153. The cubic root of 819827205 is about 935.9244119962.

The spelling of 819827205 in words is "eight hundred nineteen million, eight hundred twenty-seven thousand, two hundred five".