1930639663 has 4 divisors (see below), whose sum is σ = 2044206720. Its totient is φ = 1817072608.

The previous prime is 1930639657. The next prime is 1930639681. The reversal of 1930639663 is 3669360391.

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

It is a de Polignac number, because none of the positive numbers 2^k-1930639663 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 (1930639063) 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 3 ways as a sum of consecutive naturals, for example, 56783503 + ... + 56783536.

It is an arithmetic number, because the mean of its divisors is an integer number (511051680).

Almost surely, 2^1930639663 is an apocalyptic number.

1930639663 is a deficient number, since it is larger than the sum of its proper divisors (113567057).

1930639663 is a wasteful number, since it uses less digits than its factorization.

1930639663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113567056.

The product of its (nonzero) digits is 472392, while the sum is 46.

The square root of 1930639663 is about 43939.0448576207. The cubic root of 1930639663 is about 1245.1846014771.

The spelling of 1930639663 in words is "one billion, nine hundred thirty million, six hundred thirty-nine thousand, six hundred sixty-three".