7700009 has 4 divisors (see below), whose sum is σ = 8034816. Its totient is φ = 7365204.

The previous prime is 7699981. The next prime is 7700071. The reversal of 7700009 is 9000077.

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 an emirpimes, since its reverse is a distinct semiprime: 9000077 = 47 ⋅191491.

It is a cyclic number.

It is not a de Polignac number, because 7700009 - 2⁸ = 7699753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 334783 = 7700009 / (7 + 7 + 0 + 0 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7700309) 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, 167369 + ... + 167414.

It is an arithmetic number, because the mean of its divisors is an integer number (2008704).

Almost surely, 2^7700009 is an apocalyptic number.

It is an amenable number.

7700009 is a deficient number, since it is larger than the sum of its proper divisors (334807).

7700009 is a wasteful number, since it uses less digits than its factorization.

7700009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334806.

The product of its (nonzero) digits is 441, while the sum is 23.

The square root of 7700009 is about 2774.8890067893. The cubic root of 7700009 is about 197.4681591568.

The spelling of 7700009 in words is "seven million, seven hundred thousand, nine".