1990283 has 4 divisors (see below), whose sum is σ = 2005608. Its totient is φ = 1974960.

The previous prime is 1990279. The next prime is 1990319. The reversal of 1990283 is 3820991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3820991 = 103 ⋅37097.

It is a cyclic number.

It is not a de Polignac number, because 1990283 - 2² = 1990279 is a prime.

It is a super-2 number, since 2×1990283² = 7922452840178, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7466 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (501402).

2^1990283 is an apocalyptic number.

1990283 is a deficient number, since it is larger than the sum of its proper divisors (15325).

1990283 is a wasteful number, since it uses less digits than its factorization.

1990283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15324.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1990283 is about 1410.7739010912. The cubic root of 1990283 is about 125.7877294310.

The spelling of 1990283 in words is "one million, nine hundred ninety thousand, two hundred eighty-three".