1993512785 has 16 divisors (see below), whose sum is σ = 2617107840. Its totient is φ = 1445706240.

The previous prime is 1993512767. The next prime is 1993512821. The reversal of 1993512785 is 5872153991.

It is a de Polignac number, because none of the positive numbers 2^k-1993512785 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31925 + ... + 70754.

It is an arithmetic number, because the mean of its divisors is an integer number (163569240).

Almost surely, 2^1993512785 is an apocalyptic number.

It is an amenable number.

1993512785 is a deficient number, since it is larger than the sum of its proper divisors (623595055).

1993512785 is a wasteful number, since it uses less digits than its factorization.

1993512785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103048.

The product of its digits is 680400, while the sum is 50.

The square root of 1993512785 is about 44648.7713716738. The cubic root of 1993512785 is about 1258.5573445998.

The spelling of 1993512785 in words is "one billion, nine hundred ninety-three million, five hundred twelve thousand, seven hundred eighty-five".