146168209 has 4 divisors (see below), whose sum is σ = 159456240. Its totient is φ = 132880180.

The previous prime is 146168203. The next prime is 146168213. The reversal of 146168209 is 902861641.

It is a happy number.

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 146168209 - 2³ = 146168201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146168201) 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, 6643999 + ... + 6644020.

It is an arithmetic number, because the mean of its divisors is an integer number (39864060).

Almost surely, 2^146168209 is an apocalyptic number.

It is an amenable number.

146168209 is a deficient number, since it is larger than the sum of its proper divisors (13288031).

146168209 is a wasteful number, since it uses less digits than its factorization.

146168209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13288030.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 146168209 is about 12090.0045078569. The cubic root of 146168209 is about 526.7658861208.

The spelling of 146168209 in words is "one hundred forty-six million, one hundred sixty-eight thousand, two hundred nine".