1999134716 has 24 divisors (see below), whose sum is σ = 3613854720. Its totient is φ = 966917952.

The previous prime is 1999134667. The next prime is 1999134757. The reversal of 1999134716 is 6174319991.

It is a happy number.

It is a super-2 number, since 2×1999134716² = 7993079225432801312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13436 + ... + 64643.

It is an arithmetic number, because the mean of its divisors is an integer number (150577280).

Almost surely, 2^1999134716 is an apocalyptic number.

It is an amenable number.

1999134716 is a deficient number, since it is larger than the sum of its proper divisors (1614720004).

1999134716 is a wasteful number, since it uses less digits than its factorization.

1999134716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78293 (or 78291 counting only the distinct ones).

The product of its digits is 367416, while the sum is 50.

The square root of 1999134716 is about 44711.6843341872. The cubic root of 1999134716 is about 1259.7393254309.

The spelling of 1999134716 in words is "one billion, nine hundred ninety-nine million, one hundred thirty-four thousand, seven hundred sixteen".