8920009 has 6 divisors (see below), whose sum is σ = 10376394. Its totient is φ = 7645680.

The previous prime is 8920003. The next prime is 8920027. The reversal of 8920009 is 9000298.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6350400 + 2569609 = 2520^2 + 1603^2 .

It is not a de Polignac number, because 8920009 - 2⁹ = 8919497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8920003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90972 + ... + 91069.

It is an arithmetic number, because the mean of its divisors is an integer number (1729399).

Almost surely, 2^8920009 is an apocalyptic number.

It is an amenable number.

8920009 is a deficient number, since it is larger than the sum of its proper divisors (1456385).

8920009 is a wasteful number, since it uses less digits than its factorization.

8920009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182055 (or 182048 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 8920009 is about 2986.6384113247. The cubic root of 8920009 is about 207.3902957140.

The spelling of 8920009 in words is "eight million, nine hundred twenty thousand, nine".