8219345 has 4 divisors (see below), whose sum is σ = 9863220. Its totient is φ = 6575472.

The previous prime is 8219339. The next prime is 8219353. The reversal of 8219345 is 5439128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3888784 + 4330561 = 1972^2 + 2081^2 .

It is a cyclic number.

It is not a de Polignac number, because 8219345 - 2⁴ = 8219329 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821930 + ... + 821939.

It is an arithmetic number, because the mean of its divisors is an integer number (2465805).

Almost surely, 2^8219345 is an apocalyptic number.

It is an amenable number.

8219345 is a deficient number, since it is larger than the sum of its proper divisors (1643875).

8219345 is a wasteful number, since it uses less digits than its factorization.

8219345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643874.

The product of its digits is 8640, while the sum is 32.

The square root of 8219345 is about 2866.9400063482. The cubic root of 8219345 is about 201.8114192703.

The spelling of 8219345 in words is "eight million, two hundred nineteen thousand, three hundred forty-five".