161000671 has 4 divisors (see below), whose sum is σ = 173385352. Its totient is φ = 148615992.

The previous prime is 161000669. The next prime is 161000689. The reversal of 161000671 is 176000161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176000161 = 43 ⋅4093027.

It is a cyclic number.

It is not a de Polignac number, because 161000671 - 2¹ = 161000669 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 (161000171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6192321 + ... + 6192346.

It is an arithmetic number, because the mean of its divisors is an integer number (43346338).

Almost surely, 2^161000671 is an apocalyptic number.

161000671 is a deficient number, since it is larger than the sum of its proper divisors (12384681).

161000671 is a wasteful number, since it uses less digits than its factorization.

161000671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12384680.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 161000671 is about 12688.6039815261. The cubic root of 161000671 is about 544.0129383006.

The spelling of 161000671 in words is "one hundred sixty-one million, six hundred seventy-one", and thus it is an aban number.