1131543983 has 4 divisors (see below), whose sum is σ = 1132603560. Its totient is φ = 1130484408.

The previous prime is 1131543937. The next prime is 1131543991. The reversal of 1131543983 is 3893451311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131543983 - 2²⁰ = 1130495407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131543383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528185 + ... + 530322.

It is an arithmetic number, because the mean of its divisors is an integer number (283150890).

Almost surely, 2^1131543983 is an apocalyptic number.

1131543983 is a deficient number, since it is larger than the sum of its proper divisors (1059577).

1131543983 is a wasteful number, since it uses less digits than its factorization.

1131543983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059576.

The product of its digits is 38880, while the sum is 38.

The square root of 1131543983 is about 33638.4301506476. The cubic root of 1131543983 is about 1042.0546115229.

The spelling of 1131543983 in words is "one billion, one hundred thirty-one million, five hundred forty-three thousand, nine hundred eighty-three".