7922009 has 6 divisors (see below), whose sum is σ = 8057790. Its totient is φ = 7788480.

The previous prime is 7921999. The next prime is 7922021. The reversal of 7922009 is 9002297.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 883600 + 7038409 = 940^2 + 2653^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7922009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7922059) 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, 2657 + ... + 4785.

It is an arithmetic number, because the mean of its divisors is an integer number (1342965).

Almost surely, 2^7922009 is an apocalyptic number.

It is an amenable number.

7922009 is a deficient number, since it is larger than the sum of its proper divisors (135781).

7922009 is an equidigital number, since it uses as much as digits as its factorization.

7922009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2190 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 7922009 is about 2814.6063667945. The cubic root of 7922009 is about 199.3479514738.

The spelling of 7922009 in words is "seven million, nine hundred twenty-two thousand, nine".