11181983 has 4 divisors (see below), whose sum is σ = 11284680. Its totient is φ = 11079288.

The previous prime is 11181959. The next prime is 11181991. The reversal of 11181983 is 38918111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38918111 = 59 ⋅659629.

It is a cyclic number.

It is not a de Polignac number, because 11181983 - 2¹⁶ = 11116447 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 (11181923) 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, 51185 + ... + 51402.

It is an arithmetic number, because the mean of its divisors is an integer number (2821170).

Almost surely, 2^11181983 is an apocalyptic number.

11181983 is a deficient number, since it is larger than the sum of its proper divisors (102697).

11181983 is a wasteful number, since it uses less digits than its factorization.

11181983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102696.

The product of its digits is 1728, while the sum is 32.

The square root of 11181983 is about 3343.9472184830. The cubic root of 11181983 is about 223.6177512967.

The spelling of 11181983 in words is "eleven million, one hundred eighty-one thousand, nine hundred eighty-three".