990386543 has 8 divisors (see below), whose sum is σ = 1031892480. Its totient is φ = 949478040.

The previous prime is 990386539. The next prime is 990386591. The reversal of 990386543 is 345683099.

990386543 is digitally balanced in base 2, because in such base 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 990386543 - 2² = 990386539 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 (990386843) 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, 145973 + ... + 152606.

It is an arithmetic number, because the mean of its divisors is an integer number (128986560).

Almost surely, 2^990386543 is an apocalyptic number.

990386543 is a deficient number, since it is larger than the sum of its proper divisors (41505937).

990386543 is a wasteful number, since it uses less digits than its factorization.

990386543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298717.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 990386543 is about 31470.4074171276. The cubic root of 990386543 is about 996.7851904076.

The spelling of 990386543 in words is "nine hundred ninety million, three hundred eighty-six thousand, five hundred forty-three".