145168189 has 8 divisors (see below), whose sum is σ = 153013280. Its totient is φ = 137343600.

The previous prime is 145168183. The next prime is 145168193. The reversal of 145168189 is 981861541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145168189 - 2⁷ = 145168061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145168183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10699 + ... + 20119.

It is an arithmetic number, because the mean of its divisors is an integer number (19126660).

Almost surely, 2^145168189 is an apocalyptic number.

145168189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145168189 is a deficient number, since it is larger than the sum of its proper divisors (7845091).

145168189 is an equidigital number, since it uses as much as digits as its factorization.

145168189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10251.

The product of its digits is 69120, while the sum is 43.

The square root of 145168189 is about 12048.5762229402. The cubic root of 145168189 is about 525.5618342093.

The spelling of 145168189 in words is "one hundred forty-five million, one hundred sixty-eight thousand, one hundred eighty-nine".