9975986 has 8 divisors (see below), whose sum is σ = 15446784. Its totient is φ = 4827060.

The previous prime is 9975943. The next prime is 9975989. The reversal of 9975986 is 6895799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9975989) 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, 80390 + ... + 80513.

It is an arithmetic number, because the mean of its divisors is an integer number (1930848).

Almost surely, 2^9975986 is an apocalyptic number.

9975986 is a deficient number, since it is larger than the sum of its proper divisors (5470798).

9975986 is a wasteful number, since it uses less digits than its factorization.

9975986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160936.

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

The square root of 9975986 is about 3158.4784311437. The cubic root of 9975986 is about 215.2708754585.

The spelling of 9975986 in words is "nine million, nine hundred seventy-five thousand, nine hundred eighty-six".