1116781993 has 16 divisors (see below), whose sum is σ = 1156055040. Its totient is φ = 1078264656.

The previous prime is 1116781931. The next prime is 1116782011. The reversal of 1116781993 is 3991876111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1116781993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1116782993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1330668 + ... + 1331506.

It is an arithmetic number, because the mean of its divisors is an integer number (72253440).

Almost surely, 2^1116781993 is an apocalyptic number.

It is an amenable number.

1116781993 is a deficient number, since it is larger than the sum of its proper divisors (39273047).

1116781993 is a wasteful number, since it uses less digits than its factorization.

1116781993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 81648, while the sum is 46.

The square root of 1116781993 is about 33418.2883014675. The cubic root of 1116781993 is about 1037.5032542212.

The spelling of 1116781993 in words is "one billion, one hundred sixteen million, seven hundred eighty-one thousand, nine hundred ninety-three".