1999162986 has 8 divisors (see below), whose sum is σ = 3998325984. Its totient is φ = 666387660.

The previous prime is 1999162933. The next prime is 1999162987. The reversal of 1999162986 is 6892619991.

It is a sphenic number, since it is the product of 3 distinct primes.

1999162986 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1999162987) 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, 166596910 + ... + 166596921.

It is an arithmetic number, because the mean of its divisors is an integer number (499790748).

Almost surely, 2^1999162986 is an apocalyptic number.

1999162986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999162986 is a wasteful number, since it uses less digits than its factorization.

1999162986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333193836.

The product of its digits is 3779136, while the sum is 60.

The square root of 1999162986 is about 44712.0004696726. Note that the first 3 decimals coincide. The cubic root of 1999162986 is about 1259.7452634437.

The spelling of 1999162986 in words is "one billion, nine hundred ninety-nine million, one hundred sixty-two thousand, nine hundred eighty-six".