1990667833 has 16 divisors (see below), whose sum is σ = 2513295360. Its totient is φ = 1531530000.

The previous prime is 1990667831. The next prime is 1990667849. The reversal of 1990667833 is 3387660991.

It is not a de Polignac number, because 1990667833 - 2¹ = 1990667831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990667831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157543 + ... + 169708.

It is an arithmetic number, because the mean of its divisors is an integer number (157080960).

Almost surely, 2^1990667833 is an apocalyptic number.

It is an amenable number.

1990667833 is a deficient number, since it is larger than the sum of its proper divisors (522627527).

1990667833 is a wasteful number, since it uses less digits than its factorization.

1990667833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327348.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 1990667833 is about 44616.9007552071. The cubic root of 1990667833 is about 1257.9583617591.

The spelling of 1990667833 in words is "one billion, nine hundred ninety million, six hundred sixty-seven thousand, eight hundred thirty-three".