9980023 has 4 divisors (see below), whose sum is σ = 10000368. Its totient is φ = 9959680.

The previous prime is 9980021. The next prime is 9980029. The reversal of 9980023 is 3200899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3200899 = 13 ⋅246223.

It is a cyclic number.

It is not a de Polignac number, because 9980023 - 2¹ = 9980021 is a prime.

It is a super-3 number, since 3×9980023³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980021) 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, 9418 + ... + 10423.

It is an arithmetic number, because the mean of its divisors is an integer number (2500092).

Almost surely, 2^9980023 is an apocalyptic number.

9980023 is a deficient number, since it is larger than the sum of its proper divisors (20345).

9980023 is a wasteful number, since it uses less digits than its factorization.

9980023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20344.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 9980023 is about 3159.1174400456. The cubic root of 9980023 is about 215.2999095585.

The spelling of 9980023 in words is "nine million, nine hundred eighty thousand, twenty-three".