1131681804 has 48 divisors (see below), whose sum is σ = 2885151360. Its totient is φ = 342397440.

The previous prime is 1131681799. The next prime is 1131681809. The reversal of 1131681804 is 4081861311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131681799) and next prime (1131681809).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1131681809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82467 + ... + 95205.

It is an arithmetic number, because the mean of its divisors is an integer number (60107320).

Almost surely, 2^1131681804 is an apocalyptic number.

It is an amenable number.

1131681804 is an abundant number, since it is smaller than the sum of its proper divisors (1753469556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131681804 is a wasteful number, since it uses less digits than its factorization.

1131681804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13430 (or 13428 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1131681804 is about 33640.4786529562. The cubic root of 1131681804 is about 1042.0969168981.

The spelling of 1131681804 in words is "one billion, one hundred thirty-one million, six hundred eighty-one thousand, eight hundred four".