9870998 has 4 divisors (see below), whose sum is σ = 14806500. Its totient is φ = 4935498.

The previous prime is 9870983. The next prime is 9871007. The reversal of 9870998 is 8990789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8990789 = 227 ⋅39607.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2467748 + ... + 2467751.

It is an arithmetic number, because the mean of its divisors is an integer number (3701625).

Almost surely, 2^9870998 is an apocalyptic number.

9870998 is a deficient number, since it is larger than the sum of its proper divisors (4935502).

9870998 is a wasteful number, since it uses less digits than its factorization.

9870998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935501.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 9870998 is about 3141.8144439161. The cubic root of 9870998 is about 214.5130352523.

The spelling of 9870998 in words is "nine million, eight hundred seventy thousand, nine hundred ninety-eight".