8219907 has 16 divisors (see below), whose sum is σ = 12257280. Its totient is φ = 5444136.

The previous prime is 8219903. The next prime is 8219909. The reversal of 8219907 is 7099128.

It is a happy number.

It is not a de Polignac number, because 8219907 - 2² = 8219903 is a prime.

8219907 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219903) by changing a digit.

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, 3598 + ... + 5420.

It is an arithmetic number, because the mean of its divisors is an integer number (766080).

Almost surely, 2^8219907 is an apocalyptic number.

8219907 is a deficient number, since it is larger than the sum of its proper divisors (4037373).

8219907 is a wasteful number, since it uses less digits than its factorization.

8219907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1993 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 8219907 is about 2867.0380185829. The cubic root of 8219907 is about 201.8160188028.

The spelling of 8219907 in words is "eight million, two hundred nineteen thousand, nine hundred seven".