161767 has 4 divisors (see below), whose sum is σ = 163800. Its totient is φ = 159736.

The previous prime is 161761. The next prime is 161771. The reversal of 161767 is 767161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161767 - 2⁷ = 161639 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 (161761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892 + ... + 1057.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2¹⁶¹⁷⁶⁷ is an apocalyptic number.

161767 is a deficient number, since it is larger than the sum of its proper divisors (2033).

161767 is an equidigital number, since it uses as much as digits as its factorization.

161767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032.

The product of its digits is 1764, while the sum is 28.

The square root of 161767 is about 402.2026852223. The cubic root of 161767 is about 54.4874701156.

The spelling of 161767 in words is "one hundred sixty-one thousand, seven hundred sixty-seven".