167591 has 4 divisors (see below), whose sum is σ = 173400. Its totient is φ = 161784.

The previous prime is 167543. The next prime is 167593. The reversal of 167591 is 195761.

It is a happy number.

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 167591 - 2¹⁰ = 166567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 5779 = 167591 / (1 + 6 + 7 + 5 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 167591.

It is not an unprimeable number, because it can be changed into a prime (167593) 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, 2861 + ... + 2918.

It is an arithmetic number, because the mean of its divisors is an integer number (43350).

2¹⁶⁷⁵⁹¹ is an apocalyptic number.

167591 is a deficient number, since it is larger than the sum of its proper divisors (5809).

167591 is an equidigital number, since it uses as much as digits as its factorization.

167591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808.

The product of its digits is 1890, while the sum is 29.

The square root of 167591 is about 409.3787976923. The cubic root of 167591 is about 55.1336693636.

The spelling of 167591 in words is "one hundred sixty-seven thousand, five hundred ninety-one".