9879578 has 4 divisors (see below), whose sum is σ = 14819370. Its totient is φ = 4939788.

The previous prime is 9879577. The next prime is 9879587. The reversal of 9879578 is 8759789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8759789 = 59 ⋅148471.

It can be written as a sum of positive squares in only one way, i.e., 9840769 + 38809 = 3137^2 + 197^2 .

It is a super-2 number, since 2×9879578² = 195212122916168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9879577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2469893 + ... + 2469896.

Almost surely, 2^9879578 is an apocalyptic number.

9879578 is a deficient number, since it is larger than the sum of its proper divisors (4939792).

9879578 is a wasteful number, since it uses less digits than its factorization.

9879578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4939791.

The product of its digits is 1270080, while the sum is 53.

The square root of 9879578 is about 3143.1796003410. The cubic root of 9879578 is about 214.5751697610.

The spelling of 9879578 in words is "nine million, eight hundred seventy-nine thousand, five hundred seventy-eight".