168040489 has 4 divisors (see below), whose sum is σ = 170548624. Its totient is φ = 165532356.

The previous prime is 168040469. The next prime is 168040511. The reversal of 168040489 is 984040861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 984040861 = 5023 ⋅195907.

It is a cyclic number.

It is not a de Polignac number, because 168040489 - 2¹³ = 168032297 is a prime.

It is a super-3 number, since 3×168040489³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168040469) 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, 1253967 + ... + 1254100.

It is an arithmetic number, because the mean of its divisors is an integer number (42637156).

Almost surely, 2^168040489 is an apocalyptic number.

It is an amenable number.

168040489 is a deficient number, since it is larger than the sum of its proper divisors (2508135).

168040489 is an equidigital number, since it uses as much as digits as its factorization.

168040489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508134.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 168040489 is about 12963.0431998046. The cubic root of 168040489 is about 551.8291595255.

The spelling of 168040489 in words is "one hundred sixty-eight million, forty thousand, four hundred eighty-nine".