168489641 has 4 divisors (see below), whose sum is σ = 168518784. Its totient is φ = 168460500.

The previous prime is 168489637. The next prime is 168489649. The reversal of 168489641 is 146984861.

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.

It is a cyclic number.

It is not a de Polignac number, because 168489641 - 2² = 168489637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168489649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2645 + ... + 18546.

It is an arithmetic number, because the mean of its divisors is an integer number (42129696).

Almost surely, 2^168489641 is an apocalyptic number.

It is an amenable number.

168489641 is a deficient number, since it is larger than the sum of its proper divisors (29143).

168489641 is an equidigital number, since it uses as much as digits as its factorization.

168489641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29142.

The product of its digits is 331776, while the sum is 47.

The square root of 168489641 is about 12980.3559658432. The cubic root of 168489641 is about 552.3203797675.

The spelling of 168489641 in words is "one hundred sixty-eight million, four hundred eighty-nine thousand, six hundred forty-one".