1118989647 has 20 divisors (see below), whose sum is σ = 1673270280. Its totient is φ = 745237584.

The previous prime is 1118989639. The next prime is 1118989661. The reversal of 1118989647 is 7469898111.

1118989647 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1118989647 - 2³ = 1118989639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1118989593 and 1118989602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118989637) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80128 + ... + 93050.

It is an arithmetic number, because the mean of its divisors is an integer number (83663514).

Almost surely, 2^1118989647 is an apocalyptic number.

1118989647 is a deficient number, since it is larger than the sum of its proper divisors (554280633).

1118989647 is a wasteful number, since it uses less digits than its factorization.

1118989647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14004 (or 13995 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The square root of 1118989647 is about 33451.3026203764. The cubic root of 1118989647 is about 1038.1864495170.

The spelling of 1118989647 in words is "one billion, one hundred eighteen million, nine hundred eighty-nine thousand, six hundred forty-seven".