9986157 has 12 divisors (see below), whose sum is σ = 15273180. Its totient is φ = 6265728.

The previous prime is 9986113. The next prime is 9986161. The reversal of 9986157 is 7516899.

It can be written as a sum of positive squares in 2 ways, for example, as 4691556 + 5294601 = 2166^2 + 2301^2 .

It is not a de Polignac number, because 9986157 - 2⁷ = 9986029 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32482 + ... + 32787.

It is an arithmetic number, because the mean of its divisors is an integer number (1272765).

Almost surely, 2^9986157 is an apocalyptic number.

It is an amenable number.

9986157 is a deficient number, since it is larger than the sum of its proper divisors (5287023).

9986157 is a wasteful number, since it uses less digits than its factorization.

9986157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65292 (or 65289 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 9986157 is about 3160.0881316824. The cubic root of 9986157 is about 215.3440102975.

The spelling of 9986157 in words is "nine million, nine hundred eighty-six thousand, one hundred fifty-seven".