7688672309 has 4 divisors (see below), whose sum is σ = 7713395040. Its totient is φ = 7663949580.

The previous prime is 7688672287. The next prime is 7688672371. The reversal of 7688672309 is 9032768867.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7688672309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7688672809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12360899 + ... + 12361520.

It is an arithmetic number, because the mean of its divisors is an integer number (1928348760).

Almost surely, 2^7688672309 is an apocalyptic number.

It is an amenable number.

7688672309 is a deficient number, since it is larger than the sum of its proper divisors (24722731).

7688672309 is a wasteful number, since it uses less digits than its factorization.

7688672309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24722730.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The square root of 7688672309 is about 87685.0746079400. The cubic root of 7688672309 is about 1973.7120104302.

The spelling of 7688672309 in words is "seven billion, six hundred eighty-eight million, six hundred seventy-two thousand, three hundred nine".