161867 has 4 divisors (see below), whose sum is σ = 163056. Its totient is φ = 160680.

The previous prime is 161839. The next prime is 161869. The reversal of 161867 is 768161.

161867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161867 - 2⁸ = 161611 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161869) 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, 359 + ... + 672.

It is an arithmetic number, because the mean of its divisors is an integer number (40764).

2¹⁶¹⁸⁶⁷ is an apocalyptic number.

161867 is a deficient number, since it is larger than the sum of its proper divisors (1189).

161867 is a wasteful number, since it uses less digits than its factorization.

161867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its digits is 2016, while the sum is 29.

The square root of 161867 is about 402.3269814467. The cubic root of 161867 is about 54.4986953648.

The spelling of 161867 in words is "one hundred sixty-one thousand, eight hundred sixty-seven".