167391 has 12 divisors (see below), whose sum is σ = 276432. Its totient is φ = 95616.

The previous prime is 167381. The next prime is 167393. The reversal of 167391 is 193761.

It is not a de Polignac number, because 167391 - 2¹¹ = 165343 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1266 + ... + 1391.

It is an arithmetic number, because the mean of its divisors is an integer number (23036).

2¹⁶⁷³⁹¹ is an apocalyptic number.

167391 is a deficient number, since it is larger than the sum of its proper divisors (109041).

167391 is a wasteful number, since it uses less digits than its factorization.

167391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670 (or 2667 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 167391 is about 409.1344522281. The cubic root of 167391 is about 55.1117287996. Note that the first 3 decimals are identical.

It can be divided in two parts, 1673 and 91, that added together give a square (1764 = 42²).

The spelling of 167391 in words is "one hundred sixty-seven thousand, three hundred ninety-one".