1994763985 has 16 divisors (see below), whose sum is σ = 2479458240. Its totient is φ = 1538792640.

The previous prime is 1994763973. The next prime is 1994764061. The reversal of 1994763985 is 5893674991.

It is not a de Polignac number, because 1994763985 - 2¹⁵ = 1994731217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109114 + ... + 126076.

It is an arithmetic number, because the mean of its divisors is an integer number (154966140).

Almost surely, 2^1994763985 is an apocalyptic number.

It is an amenable number.

1994763985 is a deficient number, since it is larger than the sum of its proper divisors (484694255).

1994763985 is a wasteful number, since it uses less digits than its factorization.

1994763985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17808.

The product of its digits is 14696640, while the sum is 61.

The square root of 1994763985 is about 44662.7807575838. The cubic root of 1994763985 is about 1258.8205947495.

The spelling of 1994763985 in words is "one billion, nine hundred ninety-four million, seven hundred sixty-three thousand, nine hundred eighty-five".