1189993384 has 8 divisors (see below), whose sum is σ = 2231237610. Its totient is φ = 594996688.

The previous prime is 1189993379. The next prime is 1189993393. The reversal of 1189993384 is 4833999811.

It can be written as a sum of positive squares in only one way, i.e., 848556900 + 341436484 = 29130^2 + 18478^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74374579 + ... + 74374594.

Almost surely, 2^1189993384 is an apocalyptic number.

It is an amenable number.

1189993384 is a deficient number, since it is larger than the sum of its proper divisors (1041244226).

1189993384 is a wasteful number, since it uses less digits than its factorization.

1189993384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148749179 (or 148749175 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 1189993384 is about 34496.2807270581. The cubic root of 1189993384 is about 1059.6965382654.

The spelling of 1189993384 in words is "one billion, one hundred eighty-nine million, nine hundred ninety-three thousand, three hundred eighty-four".