990722 has 4 divisors (see below), whose sum is σ = 1486086. Its totient is φ = 495360.

The previous prime is 990719. The next prime is 990733. The reversal of 990722 is 227099.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 160801 = 911^2 + 401^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247679 + ... + 247682.

2⁹⁹⁰⁷²² is an apocalyptic number.

990722 is a deficient number, since it is larger than the sum of its proper divisors (495364).

990722 is a wasteful number, since it uses less digits than its factorization.

990722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495363.

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

The square root of 990722 is about 995.3501896318. The cubic root of 990722 is about 99.6897719139.

The spelling of 990722 in words is "nine hundred ninety thousand, seven hundred twenty-two".