1990563619 has 6 divisors (see below), whose sum is σ = 2187975020. Its totient is φ = 1809603180.

The previous prime is 1990563613. The next prime is 1990563647. The reversal of 1990563619 is 9163650991.

It is not a de Polignac number, because 1990563619 - 2²⁹ = 1453692707 is a prime.

It is a super-2 number, since 2×1990563619² = 7924687042572754322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990563613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8225349 + ... + 8225590.

Almost surely, 2^1990563619 is an apocalyptic number.

1990563619 is a deficient number, since it is larger than the sum of its proper divisors (197411401).

1990563619 is a wasteful number, since it uses less digits than its factorization.

1990563619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16450961 (or 16450950 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 1990563619 is about 44615.7328640918. The cubic root of 1990563619 is about 1257.9364094678.

The spelling of 1990563619 in words is "one billion, nine hundred ninety million, five hundred sixty-three thousand, six hundred nineteen".