7900009 has 8 divisors (see below), whose sum is σ = 8782592. Its totient is φ = 7056720.

The previous prime is 7900007. The next prime is 7900033. The reversal of 7900009 is 9000097.

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

It is a cyclic number.

It is not a de Polignac number, because 7900009 - 2¹ = 7900007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7900001) 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, 9399 + ... + 10204.

It is an arithmetic number, because the mean of its divisors is an integer number (1097824).

Almost surely, 2^7900009 is an apocalyptic number.

It is an amenable number.

7900009 is a deficient number, since it is larger than the sum of its proper divisors (882583).

7900009 is a wasteful number, since it uses less digits than its factorization.

7900009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19647.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 7900009 is about 2810.6954655387. The cubic root of 7900009 is about 199.1632457605.

The spelling of 7900009 in words is "seven million, nine hundred thousand, nine".