1986007689 has 12 divisors (see below), whose sum is σ = 2869265776. Its totient is φ = 1323733752.

The previous prime is 1986007663. The next prime is 1986007691. The reversal of 1986007689 is 9867006891.

It is not a de Polignac number, because 1986007689 - 2²⁰ = 1984959113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1986005689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30234 + ... + 69900.

Almost surely, 2^1986007689 is an apocalyptic number.

It is an amenable number.

1986007689 is a deficient number, since it is larger than the sum of its proper divisors (883258087).

1986007689 is a wasteful number, since it uses less digits than its factorization.

1986007689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45236 (or 45233 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 1986007689 is about 44564.6461783329. The cubic root of 1986007689 is about 1256.9759699061.

The spelling of 1986007689 in words is "one billion, nine hundred eighty-six million, seven thousand, six hundred eighty-nine".