168431 has 4 divisors (see below), whose sum is σ = 172392. Its totient is φ = 164472.

The previous prime is 168409. The next prime is 168433. The reversal of 168431 is 134861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134861 = 17 ⋅7933.

It is a cyclic number.

It is not a de Polignac number, because 168431 - 2¹⁰ = 167407 is a prime.

It is a super-2 number, since 2×168431² = 56738003522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168397 and 168406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (43098).

2¹⁶⁸⁴³¹ is an apocalyptic number.

168431 is a deficient number, since it is larger than the sum of its proper divisors (3961).

168431 is an equidigital number, since it uses as much as digits as its factorization.

168431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960.

The product of its digits is 576, while the sum is 23.

The square root of 168431 is about 410.4034600244. The cubic root of 168431 is about 55.2256295951.

The spelling of 168431 in words is "one hundred sixty-eight thousand, four hundred thirty-one".