1991944714 has 8 divisors (see below), whose sum is σ = 2989321668. Its totient is φ = 995504160.

The previous prime is 1991944709. The next prime is 1991944729. The reversal of 1991944714 is 4174491991.

It can be written as a sum of positive squares in 2 ways, for example, as 1977314089 + 14630625 = 44467^2 + 3825^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228757 + ... + 237304.

Almost surely, 2^1991944714 is an apocalyptic number.

1991944714 is a deficient number, since it is larger than the sum of its proper divisors (997376954).

1991944714 is a wasteful number, since it uses less digits than its factorization.

1991944714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468200.

The product of its digits is 326592, while the sum is 49.

The square root of 1991944714 is about 44631.2078483207. The cubic root of 1991944714 is about 1258.2272698093.

The spelling of 1991944714 in words is "one billion, nine hundred ninety-one million, nine hundred forty-four thousand, seven hundred fourteen".