1993979716 has 27 divisors (see below), whose sum is σ = 3545191741. Its totient is φ = 981316304.

The previous prime is 1993979591. The next prime is 1993979717. The reversal of 1993979716 is 6179793991.

It is a happy number.

The square root of 1993979716 is 44654.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 131194116 + 1862785600 = 11454^2 + 43160^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1993979717) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7412430 + ... + 7412698.

Almost surely, 2^1993979716 is an apocalyptic number.

1993979716 is the 44654-th square number.

It is an amenable number.

1993979716 is a deficient number, since it is larger than the sum of its proper divisors (1551212025).

1993979716 is an frugal number, since it uses more digits than its factorization.

1993979716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 354 counting only the distinct ones).

The product of its digits is 5786802, while the sum is 61.

The cubic root of 1993979716 is about 1258.6555988922.

The spelling of 1993979716 in words is "one billion, nine hundred ninety-three million, nine hundred seventy-nine thousand, seven hundred sixteen".