990537 has 8 divisors (see below), whose sum is σ = 1339104. Its totient is φ = 651168.

The previous prime is 990529. The next prime is 990547. The reversal of 990537 is 735099.

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

It is not a de Polignac number, because 990537 - 2³ = 990529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990498 and 990507.

It is not an unprimeable number, because it can be changed into a prime (990547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2043 + ... + 2480.

It is an arithmetic number, because the mean of its divisors is an integer number (167388).

2⁹⁹⁰⁵³⁷ is an apocalyptic number.

It is an amenable number.

990537 is a deficient number, since it is larger than the sum of its proper divisors (348567).

990537 is a wasteful number, since it uses less digits than its factorization.

990537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599.

The product of its (nonzero) digits is 8505, while the sum is 33.

The square root of 990537 is about 995.2572531763. The cubic root of 990537 is about 99.6835664207.

The spelling of 990537 in words is "nine hundred ninety thousand, five hundred thirty-seven".