1173823861 has 8 divisors (see below), whose sum is σ = 1368891200. Its totient is φ = 1006134444.

The previous prime is 1173823841. The next prime is 1173823873. The reversal of 1173823861 is 1683283711.

It is not a de Polignac number, because 1173823861 - 2¹⁵ = 1173791093 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 (1173823801) 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 7 ways as a sum of consecutive naturals, for example, 1710771 + ... + 1711456.

It is an arithmetic number, because the mean of its divisors is an integer number (171111400).

Almost surely, 2^1173823861 is an apocalyptic number.

It is an amenable number.

1173823861 is a deficient number, since it is larger than the sum of its proper divisors (195067339).

1173823861 is an frugal number, since it uses more digits than its factorization.

1173823861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422248 (or 3422234 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 1173823861 is about 34261.1129562366. The cubic root of 1173823861 is about 1054.8749463568.

The spelling of 1173823861 in words is "one billion, one hundred seventy-three million, eight hundred twenty-three thousand, eight hundred sixty-one".