9902243 has 4 divisors (see below), whose sum is σ = 10663968. Its totient is φ = 9140520.

The previous prime is 9902239. The next prime is 9902257. The reversal of 9902243 is 3422099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9902243 - 2² = 9902239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9902203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380843 + ... + 380868.

It is an arithmetic number, because the mean of its divisors is an integer number (2665992).

Almost surely, 2^9902243 is an apocalyptic number.

9902243 is a deficient number, since it is larger than the sum of its proper divisors (761725).

9902243 is a wasteful number, since it uses less digits than its factorization.

9902243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761724.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 9902243 is about 3146.7829604216. The cubic root of 9902243 is about 214.7391319569.

The spelling of 9902243 in words is "nine million, nine hundred two thousand, two hundred forty-three".