7689009 has 4 divisors (see below), whose sum is σ = 10252016. Its totient is φ = 5126004.

The previous prime is 7688999. The next prime is 7689043. The reversal of 7689009 is 9009867.

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.

It is not a de Polignac number, because 7689009 - 2⁷ = 7688881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (7689109) 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, 1281499 + ... + 1281504.

It is an arithmetic number, because the mean of its divisors is an integer number (2563004).

Almost surely, 2^7689009 is an apocalyptic number.

It is an amenable number.

7689009 is a deficient number, since it is larger than the sum of its proper divisors (2563007).

7689009 is a wasteful number, since it uses less digits than its factorization.

7689009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563006.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 7689009 is about 2772.9062371454. The cubic root of 7689009 is about 197.3740819972.

The spelling of 7689009 in words is "seven million, six hundred eighty-nine thousand, nine".