990539 has 8 divisors (see below), whose sum is σ = 1144368. Its totient is φ = 847360.

The previous prime is 990529. The next prime is 990547. The reversal of 990539 is 935099.

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 990539 - 2⁴ = 990523 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990499 and 990508.

It is not an unprimeable number, because it can be changed into a prime (990529) 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, 2462 + ... + 2835.

It is an arithmetic number, because the mean of its divisors is an integer number (143046).

2⁹⁹⁰⁵³⁹ is an apocalyptic number.

990539 is a deficient number, since it is larger than the sum of its proper divisors (153829).

990539 is a wasteful number, since it uses less digits than its factorization.

990539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325.

The product of its (nonzero) digits is 10935, while the sum is 35.

The square root of 990539 is about 995.2582579411. The cubic root of 990539 is about 99.6836335113.

The spelling of 990539 in words is "nine hundred ninety thousand, five hundred thirty-nine".