1118373921 has 24 divisors (see below), whose sum is σ = 1856537280. Its totient is φ = 635494176.

The previous prime is 1118373913. The next prime is 1118373937. The reversal of 1118373921 is 1293738111.

It is not a de Polignac number, because 1118373921 - 2³ = 1118373913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1118373901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38310 + ... + 60863.

It is an arithmetic number, because the mean of its divisors is an integer number (77355720).

Almost surely, 2^1118373921 is an apocalyptic number.

It is an amenable number.

1118373921 is a deficient number, since it is larger than the sum of its proper divisors (738163359).

1118373921 is a wasteful number, since it uses less digits than its factorization.

1118373921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99365 (or 99362 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 1118373921 is about 33442.0980352609. The cubic root of 1118373921 is about 1037.9959932798.

The spelling of 1118373921 in words is "one billion, one hundred eighteen million, three hundred seventy-three thousand, nine hundred twenty-one".