1173945543 has 8 divisors (see below), whose sum is σ = 1565419008. Its totient is φ = 782551224.

The previous prime is 1173945527. The next prime is 1173945551. The reversal of 1173945543 is 3455493711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1173945543 - 2⁴ = 1173945527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1173945495 and 1173945504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173945593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48196 + ... + 68342.

It is an arithmetic number, because the mean of its divisors is an integer number (195677376).

Almost surely, 2^1173945543 is an apocalyptic number.

1173945543 is a deficient number, since it is larger than the sum of its proper divisors (391473465).

1173945543 is a wasteful number, since it uses less digits than its factorization.

1173945543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39573.

The product of its digits is 226800, while the sum is 42.

The square root of 1173945543 is about 34262.8887135921. Note that the first 3 decimals coincide. The cubic root of 1173945543 is about 1054.9113955671.

The spelling of 1173945543 in words is "one billion, one hundred seventy-three million, nine hundred forty-five thousand, five hundred forty-three".