146446009 has 4 divisors (see below), whose sum is σ = 146534004. Its totient is φ = 146358016.

The previous prime is 146445997. The next prime is 146446019. The reversal of 146446009 is 900644641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900644641 = 13 ⋅69280357.

It can be written as a sum of positive squares in 2 ways, for example, as 74874409 + 71571600 = 8653^2 + 8460^2 .

It is a cyclic number.

It is not a de Polignac number, because 146446009 - 2⁷ = 146445881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146446019) 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, 41452 + ... + 44845.

It is an arithmetic number, because the mean of its divisors is an integer number (36633501).

Almost surely, 2^146446009 is an apocalyptic number.

It is an amenable number.

146446009 is a deficient number, since it is larger than the sum of its proper divisors (87995).

146446009 is an equidigital number, since it uses as much as digits as its factorization.

146446009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87994.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 146446009 is about 12101.4878837274. The cubic root of 146446009 is about 527.0993899105.

The spelling of 146446009 in words is "one hundred forty-six million, four hundred forty-six thousand, nine".