8199442 has 4 divisors (see below), whose sum is σ = 12299166. Its totient is φ = 4099720.

The previous prime is 8199427. The next prime is 8199449. The reversal of 8199442 is 2449918.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 4661281 + 3538161 = 2159^2 + 1881^2 .

It is a super-2 number, since 2×8199442² = 134461698222728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8199449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2049859 + ... + 2049862.

Almost surely, 2^8199442 is an apocalyptic number.

8199442 is a deficient number, since it is larger than the sum of its proper divisors (4099724).

8199442 is a wasteful number, since it uses less digits than its factorization.

8199442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4099723.

The product of its digits is 20736, while the sum is 37.

The square root of 8199442 is about 2863.4667799714. The cubic root of 8199442 is about 201.6483933385.

The spelling of 8199442 in words is "eight million, one hundred ninety-nine thousand, four hundred forty-two".