9990983 has 4 divisors (see below), whose sum is σ = 9999840. Its totient is φ = 9982128.

The previous prime is 9990961. The next prime is 9990989. The reversal of 9990983 is 3890999.

It is a happy number.

9990983 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3890999 = 7 ⋅555857.

It is a cyclic number.

It is not a de Polignac number, because 9990983 - 2⁶ = 9990919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990989) 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, 2438 + ... + 5091.

It is an arithmetic number, because the mean of its divisors is an integer number (2499960).

Almost surely, 2^9990983 is an apocalyptic number.

9990983 is a deficient number, since it is larger than the sum of its proper divisors (8857).

9990983 is a wasteful number, since it uses less digits than its factorization.

9990983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 9990983 is about 3160.8516257490. The cubic root of 9990983 is about 215.3786944049.

The spelling of 9990983 in words is "nine million, nine hundred ninety thousand, nine hundred eighty-three".