109840142173 has 4 divisors (see below), whose sum is σ = 112394564128. Its totient is φ = 107285720220.

The previous prime is 109840142117. The next prime is 109840142177. The reversal of 109840142173 is 371241048901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371241048901 = 317411 ⋅1169591.

It is a cyclic number.

It is not a de Polignac number, because 109840142173 - 2²¹ = 109838045021 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 (109840142177) 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, 1277210913 + ... + 1277210998.

It is an arithmetic number, because the mean of its divisors is an integer number (28098641032).

Almost surely, 2^109840142173 is an apocalyptic number.

It is an amenable number.

109840142173 is a deficient number, since it is larger than the sum of its proper divisors (2554421955).

109840142173 is an equidigital number, since it uses as much as digits as its factorization.

109840142173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554421954.

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

The spelling of 109840142173 in words is "one hundred nine billion, eight hundred forty million, one hundred forty-two thousand, one hundred seventy-three".