9887842 has 4 divisors (see below), whose sum is σ = 14831766. Its totient is φ = 4943920.

The previous prime is 9887837. The next prime is 9887851. The reversal of 9887842 is 2487889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2487889 = 1429 ⋅1741.

It can be written as a sum of positive squares in only one way, i.e., 9803161 + 84681 = 3131^2 + 291^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9887792 and 9887801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2471959 + ... + 2471962.

Almost surely, 2^9887842 is an apocalyptic number.

9887842 is a deficient number, since it is larger than the sum of its proper divisors (4943924).

9887842 is a wasteful number, since it uses less digits than its factorization.

9887842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943923.

The product of its digits is 258048, while the sum is 46.

The square root of 9887842 is about 3144.4939179461. The cubic root of 9887842 is about 214.6349818639.

The spelling of 9887842 in words is "nine million, eight hundred eighty-seven thousand, eight hundred forty-two".