9879956 has 6 divisors (see below), whose sum is σ = 17289930. Its totient is φ = 4939976.

The previous prime is 9879953. The next prime is 9879959. The reversal of 9879956 is 6599789.

It is an interprime number because it is at equal distance from previous prime (9879953) and next prime (9879959).

It can be written as a sum of positive squares in only one way, i.e., 8317456 + 1562500 = 2884^2 + 1250^2 .

It is a super-2 number, since 2×9879956² = 195227061123872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9879898 and 9879907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9879953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1234991 + ... + 1234998.

It is an arithmetic number, because the mean of its divisors is an integer number (2881655).

Almost surely, 2^9879956 is an apocalyptic number.

It is an amenable number.

9879956 is a deficient number, since it is larger than the sum of its proper divisors (7409974).

9879956 is a wasteful number, since it uses less digits than its factorization.

9879956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469993 (or 2469991 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 53.

The square root of 9879956 is about 3143.2397299602. The cubic root of 9879956 is about 214.5779063279.

The spelling of 9879956 in words is "nine million, eight hundred seventy-nine thousand, nine hundred fifty-six".