8942209 has 4 divisors (see below), whose sum is σ = 8949760. Its totient is φ = 8934660.

The previous prime is 8942207. The next prime is 8942233. The reversal of 8942209 is 9022498.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9022498 = 2 ⋅4511249.

It is a cyclic number.

It is not a de Polignac number, because 8942209 - 2¹ = 8942207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8942207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1569 + ... + 4510.

It is an arithmetic number, because the mean of its divisors is an integer number (2237440).

Almost surely, 2^8942209 is an apocalyptic number.

It is an amenable number.

8942209 is a deficient number, since it is larger than the sum of its proper divisors (7551).

8942209 is a wasteful number, since it uses less digits than its factorization.

8942209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 8942209 is about 2990.3526547884. The cubic root of 8942209 is about 207.5622032508.

The spelling of 8942209 in words is "eight million, nine hundred forty-two thousand, two hundred nine".