1133981894 has 16 divisors (see below), whose sum is σ = 1723597920. Its totient is φ = 559493760.

The previous prime is 1133981881. The next prime is 1133981929. The reversal of 1133981894 is 4981893311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40799 + ... + 62709.

It is an arithmetic number, because the mean of its divisors is an integer number (107724870).

Almost surely, 2^1133981894 is an apocalyptic number.

1133981894 is a deficient number, since it is larger than the sum of its proper divisors (589616026).

1133981894 is a wasteful number, since it uses less digits than its factorization.

1133981894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22255.

The product of its digits is 186624, while the sum is 47.

The square root of 1133981894 is about 33674.6476447787. The cubic root of 1133981894 is about 1042.8024434418.

The spelling of 1133981894 in words is "one billion, one hundred thirty-three million, nine hundred eighty-one thousand, eight hundred ninety-four".