990773 has 4 divisors (see below), whose sum is σ = 1132320. Its totient is φ = 849228.

The previous prime is 990767. The next prime is 990797. The reversal of 990773 is 377099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 990773 - 2¹⁰ = 989749 is a prime.

It is a super-2 number, since 2×990773² = 1963262275058, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70763 + ... + 70776.

It is an arithmetic number, because the mean of its divisors is an integer number (283080).

2⁹⁹⁰⁷⁷³ is an apocalyptic number.

It is an amenable number.

990773 is a deficient number, since it is larger than the sum of its proper divisors (141547).

990773 is a wasteful number, since it uses less digits than its factorization.

990773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141546.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 990773 is about 995.3758084261. The cubic root of 990773 is about 99.6914824816.

The spelling of 990773 in words is "nine hundred ninety thousand, seven hundred seventy-three".