8219965 has 8 divisors (see below), whose sum is σ = 10622808. Its totient is φ = 6070080.

The previous prime is 8219941. The next prime is 8219969. The reversal of 8219965 is 5699128.

It can be written as a sum of positive squares in 4 ways, for example, as 171396 + 8048569 = 414^2 + 2837^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8219965 - 2¹³ = 8211773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63166 + ... + 63295.

It is an arithmetic number, because the mean of its divisors is an integer number (1327851).

Almost surely, 2^8219965 is an apocalyptic number.

It is an amenable number.

8219965 is a deficient number, since it is larger than the sum of its proper divisors (2402843).

8219965 is a wasteful number, since it uses less digits than its factorization.

8219965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126479.

The product of its digits is 38880, while the sum is 40.

The square root of 8219965 is about 2867.0481335339. The cubic root of 8219965 is about 201.8164934757.

The spelling of 8219965 in words is "eight million, two hundred nineteen thousand, nine hundred sixty-five".