1990885333 has 4 divisors (see below), whose sum is σ = 1991287648. Its totient is φ = 1990483020.

The previous prime is 1990885331. The next prime is 1990885343. The reversal of 1990885333 is 3335880991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1990885333 - 2¹ = 1990885331 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990885331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193641 + ... + 203662.

It is an arithmetic number, because the mean of its divisors is an integer number (497821912).

Almost surely, 2^1990885333 is an apocalyptic number.

It is an amenable number.

1990885333 is a deficient number, since it is larger than the sum of its proper divisors (402315).

1990885333 is an equidigital number, since it uses as much as digits as its factorization.

1990885333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402314.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 1990885333 is about 44619.3381058034. The cubic root of 1990885333 is about 1258.0041748568.

The spelling of 1990885333 in words is "one billion, nine hundred ninety million, eight hundred eighty-five thousand, three hundred thirty-three".