1183988971 has 32 divisors (see below), whose sum is σ = 1398919680. Its totient is φ = 990662400.

The previous prime is 1183988969. The next prime is 1183988989. The reversal of 1183988971 is 1798893811.

It is a cyclic number.

It is not a de Polignac number, because 1183988971 - 2¹ = 1183988969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1183988371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1082701 + ... + 1083793.

It is an arithmetic number, because the mean of its divisors is an integer number (43716240).

Almost surely, 2^1183988971 is an apocalyptic number.

1183988971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1183988971 is a deficient number, since it is larger than the sum of its proper divisors (214930709).

1183988971 is a wasteful number, since it uses less digits than its factorization.

1183988971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267.

The product of its digits is 870912, while the sum is 55.

The square root of 1183988971 is about 34409.1408058963. The cubic root of 1183988971 is about 1057.9112096922.

The spelling of 1183988971 in words is "one billion, one hundred eighty-three million, nine hundred eighty-eight thousand, nine hundred seventy-one".