173891161 has 8 divisors (see below), whose sum is σ = 175374720. Its totient is φ = 172413648.

The previous prime is 173891143. The next prime is 173891167. The reversal of 173891161 is 161198371.

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

It is a cyclic number.

It is not a de Polignac number, because 173891161 - 2⁷ = 173891033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 173891161.

It is not an unprimeable number, because it can be changed into a prime (173891167) 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, 69840 + ... + 72286.

It is an arithmetic number, because the mean of its divisors is an integer number (21921840).

Almost surely, 2^173891161 is an apocalyptic number.

It is an amenable number.

173891161 is a deficient number, since it is larger than the sum of its proper divisors (1483559).

173891161 is a wasteful number, since it uses less digits than its factorization.

173891161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023.

The product of its digits is 9072, while the sum is 37.

The square root of 173891161 is about 13186.7797812809. The cubic root of 173891161 is about 558.1605899899.

The spelling of 173891161 in words is "one hundred seventy-three million, eight hundred ninety-one thousand, one hundred sixty-one".