146216189 has 4 divisors (see below), whose sum is σ = 167104224. Its totient is φ = 125328156.

The previous prime is 146216183. The next prime is 146216227. The reversal of 146216189 is 981612641.

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: 981612641 = 11939 ⋅82219.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146216189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146216183) 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, 10444007 + ... + 10444020.

It is an arithmetic number, because the mean of its divisors is an integer number (41776056).

Almost surely, 2^146216189 is an apocalyptic number.

It is an amenable number.

146216189 is a deficient number, since it is larger than the sum of its proper divisors (20888035).

146216189 is an equidigital number, since it uses as much as digits as its factorization.

146216189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20888034.

The product of its digits is 20736, while the sum is 38.

The square root of 146216189 is about 12091.9886288402. The cubic root of 146216189 is about 526.8235171256.

The spelling of 146216189 in words is "one hundred forty-six million, two hundred sixteen thousand, one hundred eighty-nine".