1999922 has 4 divisors (see below), whose sum is σ = 2999886. Its totient is φ = 999960.

The previous prime is 1999891. The next prime is 1999957. The reversal of 1999922 is 2299991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2299991 = 887 ⋅2593.

It can be written as a sum of positive squares in only one way, i.e., 1985281 + 14641 = 1409^2 + 121^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1999922.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499979 + ... + 499982.

2^1999922 is an apocalyptic number.

1999922 is a deficient number, since it is larger than the sum of its proper divisors (999964).

1999922 is an equidigital number, since it uses as much as digits as its factorization.

1999922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999963.

The product of its digits is 26244, while the sum is 41.

The square root of 1999922 is about 1414.1859849397. The cubic root of 1999922 is about 125.9904670708.

The spelling of 1999922 in words is "one million, nine hundred ninety-nine thousand, nine hundred twenty-two".