9802123 has 4 divisors (see below), whose sum is σ = 9837288. Its totient is φ = 9766960.

The previous prime is 9802109. The next prime is 9802139. The reversal of 9802123 is 3212089.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9802123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9802103) 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, 17161 + ... + 17722.

It is an arithmetic number, because the mean of its divisors is an integer number (2459322).

Almost surely, 2^9802123 is an apocalyptic number.

9802123 is a deficient number, since it is larger than the sum of its proper divisors (35165).

9802123 is a wasteful number, since it uses less digits than its factorization.

9802123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35164.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 9802123 is about 3130.8342338744. The cubic root of 9802123 is about 214.0129479457.

The spelling of 9802123 in words is "nine million, eight hundred two thousand, one hundred twenty-three".