9990043 has 8 divisors (see below), whose sum is σ = 11469312. Its totient is φ = 8523816.

The previous prime is 9990017. The next prime is 9990047. The reversal of 9990043 is 3400999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9990043 - 2¹⁷ = 9858971 is a prime.

It is a Duffinian number.

9990043 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9989990 and 9990008.

It is not an unprimeable number, because it can be changed into a prime (9990047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1555 + ... + 4732.

It is an arithmetic number, because the mean of its divisors is an integer number (1433664).

Almost surely, 2^9990043 is an apocalyptic number.

9990043 is a deficient number, since it is larger than the sum of its proper divisors (1479269).

9990043 is a wasteful number, since it uses less digits than its factorization.

9990043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 9990043 is about 3160.7029281475. The cubic root of 9990043 is about 215.3719395700.

The spelling of 9990043 in words is "nine million, nine hundred ninety thousand, forty-three".