9640879 has 4 divisors (see below), whose sum is σ = 9663280. Its totient is φ = 9618480.

The previous prime is 9640871. The next prime is 9640889. The reversal of 9640879 is 9780469.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9640879 - 2³ = 9640871 is a prime.

It is a Duffinian number.

9640879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640871) 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, 10542 + ... + 11419.

It is an arithmetic number, because the mean of its divisors is an integer number (2415820).

Almost surely, 2^9640879 is an apocalyptic number.

9640879 is a deficient number, since it is larger than the sum of its proper divisors (22401).

9640879 is a wasteful number, since it uses less digits than its factorization.

9640879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22400.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 9640879 is about 3104.9764894440. The cubic root of 9640879 is about 212.8329562348.

The spelling of 9640879 in words is "nine million, six hundred forty thousand, eight hundred seventy-nine".