9879725 has 6 divisors (see below), whose sum is σ = 12250890. Its totient is φ = 7903760.

The previous prime is 9879697. The next prime is 9879757. The reversal of 9879725 is 5279789.

It can be written as a sum of positive squares in 3 ways, for example, as 813604 + 9066121 = 902^2 + 3011^2 .

It is not a de Polignac number, because 9879725 - 2⁸ = 9879469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9879725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197570 + ... + 197619.

It is an arithmetic number, because the mean of its divisors is an integer number (2041815).

Almost surely, 2^9879725 is an apocalyptic number.

It is an amenable number.

9879725 is a deficient number, since it is larger than the sum of its proper divisors (2371165).

9879725 is a wasteful number, since it uses less digits than its factorization.

9879725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395199 (or 395194 counting only the distinct ones).

The product of its digits is 317520, while the sum is 47.

The square root of 9879725 is about 3143.2029842185. The cubic root of 9879725 is about 214.5762339897.

The spelling of 9879725 in words is "nine million, eight hundred seventy-nine thousand, seven hundred twenty-five".