1158173823 has 8 divisors (see below), whose sum is σ = 1625507200. Its totient is φ = 731478168.

The previous prime is 1158173813. The next prime is 1158173837. The reversal of 1158173823 is 3283718511.

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

It is not a de Polignac number, because 1158173823 - 2⁹ = 1158173311 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 (1158173813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10159363 + ... + 10159476.

It is an arithmetic number, because the mean of its divisors is an integer number (203188400).

Almost surely, 2^1158173823 is an apocalyptic number.

1158173823 is a deficient number, since it is larger than the sum of its proper divisors (467333377).

1158173823 is a wasteful number, since it uses less digits than its factorization.

1158173823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20318861.

The product of its digits is 40320, while the sum is 39.

The square root of 1158173823 is about 34031.9529707009. The cubic root of 1158173823 is about 1050.1659066641.

The spelling of 1158173823 in words is "one billion, one hundred fifty-eight million, one hundred seventy-three thousand, eight hundred twenty-three".