1118784779 has 8 divisors (see below), whose sum is σ = 1282042080. Its totient is φ = 956385216.

The previous prime is 1118784769. The next prime is 1118784811. The reversal of 1118784779 is 9774878111.

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

It is a cyclic number.

It is not a de Polignac number, because 1118784779 - 2¹² = 1118780683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1118784779.

It is not an unprimeable number, because it can be changed into a prime (1118784769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211634 + ... + 216855.

It is an arithmetic number, because the mean of its divisors is an integer number (160255260).

Almost surely, 2^1118784779 is an apocalyptic number.

1118784779 is a deficient number, since it is larger than the sum of its proper divisors (163257301).

1118784779 is an equidigital number, since it uses as much as digits as its factorization.

1118784779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428869.

The product of its digits is 790272, while the sum is 53.

The square root of 1118784779 is about 33448.2402975104. The cubic root of 1118784779 is about 1038.1230875477.

The spelling of 1118784779 in words is "one billion, one hundred eighteen million, seven hundred eighty-four thousand, seven hundred seventy-nine".