820470219 has 4 divisors (see below), whose sum is σ = 1093960296. Its totient is φ = 546980144.

The previous prime is 820470199. The next prime is 820470223. The reversal of 820470219 is 912074028.

It is a happy number.

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 820470219 - 2⁹ = 820469707 is a prime.

It is a super-2 number, since 2×820470219² = 1346342760531815922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 820470219.

It is not an unprimeable number, because it can be changed into a prime (820470719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136745034 + ... + 136745039.

It is an arithmetic number, because the mean of its divisors is an integer number (273490074).

Almost surely, 2^820470219 is an apocalyptic number.

820470219 is a deficient number, since it is larger than the sum of its proper divisors (273490077).

820470219 is a wasteful number, since it uses less digits than its factorization.

820470219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273490076.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 820470219 is about 28643.8513297357. The cubic root of 820470219 is about 936.1690388416.

The spelling of 820470219 in words is "eight hundred twenty million, four hundred seventy thousand, two hundred nineteen".