1194891983 has 4 divisors (see below), whose sum is σ = 1196668128. Its totient is φ = 1193115840.

The previous prime is 1194891977. The next prime is 1194891991. The reversal of 1194891983 is 3891984911.

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 1194891983 - 2⁴ = 1194891967 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 (1194891583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887063 + ... + 888408.

It is an arithmetic number, because the mean of its divisors is an integer number (299167032).

Almost surely, 2^1194891983 is an apocalyptic number.

1194891983 is a deficient number, since it is larger than the sum of its proper divisors (1776145).

1194891983 is an equidigital number, since it uses as much as digits as its factorization.

1194891983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776144.

The product of its digits is 559872, while the sum is 53.

The square root of 1194891983 is about 34567.2096501873. The cubic root of 1194891983 is about 1061.1486252473.

The spelling of 1194891983 in words is "one billion, one hundred ninety-four million, eight hundred ninety-one thousand, nine hundred eighty-three".