999946 has 4 divisors (see below), whose sum is σ = 1499922. Its totient is φ = 499972.

The previous prime is 999931. The next prime is 999953. The reversal of 999946 is 649999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649999 = 7 ⋅92857.

It can be written as a sum of positive squares in only one way, i.e., 657721 + 342225 = 811^2 + 585^2 .

It is a junction number, because it is equal to n+sod(n) for n = 999896 and 999905.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249985 + ... + 249988.

2⁹⁹⁹⁹⁴⁶ is an apocalyptic number.

999946 is a deficient number, since it is larger than the sum of its proper divisors (499976).

999946 is a wasteful number, since it uses less digits than its factorization.

999946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499975.

The product of its digits is 157464, while the sum is 46.

The square root of 999946 is about 999.9729996355. The cubic root of 999946 is about 99.9981999676.

It can be divided in two parts, 99994 and 6, that added together give a 5-th power (100000 = 10⁵).

The spelling of 999946 in words is "nine hundred ninety-nine thousand, nine hundred forty-six".