172667 has 6 divisors (see below), whose sum is σ = 189924. Its totient is φ = 156860.

The previous prime is 172663. The next prime is 172673. The reversal of 172667 is 766271.

It is not a de Polignac number, because 172667 - 2² = 172663 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 (172663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593 + ... + 834.

It is an arithmetic number, because the mean of its divisors is an integer number (31654).

2¹⁷²⁶⁶⁷ is an apocalyptic number.

172667 is a deficient number, since it is larger than the sum of its proper divisors (17257).

172667 is a wasteful number, since it uses less digits than its factorization.

172667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449 (or 1438 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 172667 is about 415.5321888855. The cubic root of 172667 is about 55.6847722588.

The spelling of 172667 in words is "one hundred seventy-two thousand, six hundred sixty-seven".