990047 has 8 divisors (see below), whose sum is σ = 1034880. Its totient is φ = 946080.

The previous prime is 990043. The next prime is 990053. The reversal of 990047 is 740099.

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 990047 - 2² = 990043 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 (990043) 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, 3233 + ... + 3525.

It is an arithmetic number, because the mean of its divisors is an integer number (129360).

2⁹⁹⁰⁰⁴⁷ is an apocalyptic number.

990047 is a deficient number, since it is larger than the sum of its proper divisors (44833).

990047 is a wasteful number, since it uses less digits than its factorization.

990047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 990047 is about 995.0110552150. The cubic root of 990047 is about 99.6671265152.

The spelling of 990047 in words is "nine hundred ninety thousand, forty-seven".