9899242 has 4 divisors (see below), whose sum is σ = 14848866. Its totient is φ = 4949620.

The previous prime is 9899221. The next prime is 9899257. The reversal of 9899242 is 2429989.

It is a happy number.

9899242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2429989 = 199 ⋅12211.

It can be written as a sum of positive squares in only one way, i.e., 8579041 + 1320201 = 2929^2 + 1149^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2474809 + ... + 2474812.

Almost surely, 2^9899242 is an apocalyptic number.

9899242 is a deficient number, since it is larger than the sum of its proper divisors (4949624).

9899242 is a wasteful number, since it uses less digits than its factorization.

9899242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949623.

The product of its digits is 93312, while the sum is 43.

The square root of 9899242 is about 3146.3060880976. The cubic root of 9899242 is about 214.7174366283.

The spelling of 9899242 in words is "nine million, eight hundred ninety-nine thousand, two hundred forty-two".