173923809979 has 4 divisors (see below), whose sum is σ = 173989222120. Its totient is φ = 173858397840.

The previous prime is 173923809959. The next prime is 173923810087. The reversal of 173923809979 is 979908329371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979908329371 = 1009 ⋅971167819.

It is a cyclic number.

It is not a de Polignac number, because 173923809979 - 2³³ = 165333875387 is a prime.

It is a super-2 number, since 2×173923809979² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173923809929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32702082 + ... + 32707399.

It is an arithmetic number, because the mean of its divisors is an integer number (43497305530).

Almost surely, 2^173923809979 is an apocalyptic number.

173923809979 is a deficient number, since it is larger than the sum of its proper divisors (65412141).

173923809979 is an equidigital number, since it uses as much as digits as its factorization.

173923809979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65412140.

The product of its (nonzero) digits is 46294416, while the sum is 67.

The spelling of 173923809979 in words is "one hundred seventy-three billion, nine hundred twenty-three million, eight hundred nine thousand, nine hundred seventy-nine".