1131318837 has 12 divisors (see below), whose sum is σ = 1782684384. Its totient is φ = 685647720.

The previous prime is 1131318821. The next prime is 1131318841. The reversal of 1131318837 is 7388131311.

It is a happy number.

1131318837 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 1131318837 - 2⁴ = 1131318821 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131318817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5713633 + ... + 5713830.

It is an arithmetic number, because the mean of its divisors is an integer number (148557032).

Almost surely, 2^1131318837 is an apocalyptic number.

It is an amenable number.

1131318837 is a deficient number, since it is larger than the sum of its proper divisors (651365547).

1131318837 is a wasteful number, since it uses less digits than its factorization.

1131318837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11427480 (or 11427477 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1131318837 is about 33635.0834249003. The cubic root of 1131318837 is about 1041.9854935763.

The spelling of 1131318837 in words is "one billion, one hundred thirty-one million, three hundred eighteen thousand, eight hundred thirty-seven".