168531423 has 4 divisors (see below), whose sum is σ = 224708568. Its totient is φ = 112354280.

The previous prime is 168531409. The next prime is 168531431. The reversal of 168531423 is 324135861.

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 168531423 - 2⁶ = 168531359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168530423) 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, 28088568 + ... + 28088573.

It is an arithmetic number, because the mean of its divisors is an integer number (56177142).

Almost surely, 2^168531423 is an apocalyptic number.

168531423 is a deficient number, since it is larger than the sum of its proper divisors (56177145).

168531423 is an equidigital number, since it uses as much as digits as its factorization.

168531423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56177144.

The product of its digits is 17280, while the sum is 33.

The square root of 168531423 is about 12981.9652980587. The cubic root of 168531423 is about 552.3660307299.

The spelling of 168531423 in words is "one hundred sixty-eight million, five hundred thirty-one thousand, four hundred twenty-three".