8219492209 has 4 divisors (see below), whose sum is σ = 8222440000. Its totient is φ = 8216544420.

The previous prime is 8219492167. The next prime is 8219492249. The reversal of 8219492209 is 9022949128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8219492209 - 2¹¹ = 8219490161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8219492249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1469709 + ... + 1475290.

It is an arithmetic number, because the mean of its divisors is an integer number (2055610000).

Almost surely, 2^8219492209 is an apocalyptic number.

It is an amenable number.

8219492209 is a deficient number, since it is larger than the sum of its proper divisors (2947791).

8219492209 is a wasteful number, since it uses less digits than its factorization.

8219492209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947790.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 8219492209 is about 90661.4152161767. The cubic root of 8219492209 is about 2018.1262408162.

The spelling of 8219492209 in words is "eight billion, two hundred nineteen million, four hundred ninety-two thousand, two hundred nine".