9990543 has 8 divisors (see below), whose sum is σ = 14104368. Its totient is φ = 6268544.

The previous prime is 9990499. The next prime is 9990551. The reversal of 9990543 is 3450999.

It is a happy number.

9990543 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9990543 - 2¹⁷ = 9859471 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990943) 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, 97896 + ... + 97997.

It is an arithmetic number, because the mean of its divisors is an integer number (1763046).

Almost surely, 2^9990543 is an apocalyptic number.

9990543 is a deficient number, since it is larger than the sum of its proper divisors (4113825).

9990543 is a wasteful number, since it uses less digits than its factorization.

9990543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195913.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 9990543 is about 3160.7820234872. The cubic root of 9990543 is about 215.3755326200.

The spelling of 9990543 in words is "nine million, nine hundred ninety thousand, five hundred forty-three".