9800203123 has 4 divisors (see below), whose sum is σ = 9802663920. Its totient is φ = 9797742328.

The previous prime is 9800203099. The next prime is 9800203139. The reversal of 9800203123 is 3213020089.

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 9800203123 - 2²⁵ = 9766648691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9800203091 and 9800203100.

It is not an unprimeable number, because it can be changed into a prime (9800203823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224415 + ... + 1232392.

It is an arithmetic number, because the mean of its divisors is an integer number (2450665980).

Almost surely, 2^9800203123 is an apocalyptic number.

9800203123 is a deficient number, since it is larger than the sum of its proper divisors (2460797).

9800203123 is a wasteful number, since it uses less digits than its factorization.

9800203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460796.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 9800203123 is about 98995.9752868772. The cubic root of 9800203123 is about 2139.9897459986.

The spelling of 9800203123 in words is "nine billion, eight hundred million, two hundred three thousand, one hundred twenty-three".