1999946 has 24 divisors (see below), whose sum is σ = 3335724. Its totient is φ = 898560.

The previous prime is 1999891. The next prime is 1999957. The reversal of 1999946 is 6499991.

It can be written as a sum of positive squares in 6 ways, for example, as 9025 + 1990921 = 95^2 + 1411^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1999946.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20570 + ... + 20666.

2^1999946 is an apocalyptic number.

1999946 is a deficient number, since it is larger than the sum of its proper divisors (1335778).

1999946 is a wasteful number, since it uses less digits than its factorization.

1999946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 173 counting only the distinct ones).

The product of its digits is 157464, while the sum is 47.

The square root of 1999946 is about 1414.1944703611. The cubic root of 1999946 is about 125.9909710503.

The spelling of 1999946 in words is "one million, nine hundred ninety-nine thousand, nine hundred forty-six".