1990052843 has 4 divisors (see below), whose sum is σ = 2054248128. Its totient is φ = 1925857560.

The previous prime is 1990052797. The next prime is 1990052849. The reversal of 1990052843 is 3482500991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1990052843 - 2²⁴ = 1973275627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1990052843.

It is not an unprimeable number, because it can be changed into a prime (1990052849) 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, 32097596 + ... + 32097657.

It is an arithmetic number, because the mean of its divisors is an integer number (513562032).

Almost surely, 2^1990052843 is an apocalyptic number.

1990052843 is a deficient number, since it is larger than the sum of its proper divisors (64195285).

1990052843 is an equidigital number, since it uses as much as digits as its factorization.

1990052843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64195284.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1990052843 is about 44610.0083277284. The cubic root of 1990052843 is about 1257.8288053223.

The spelling of 1990052843 in words is "one billion, nine hundred ninety million, fifty-two thousand, eight hundred forty-three".