146316509 has 2 divisors, whose sum is σ = 146316510. Its totient is φ = 146316508.

The previous prime is 146316503. The next prime is 146316523. The reversal of 146316509 is 905613641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76125625 + 70190884 = 8725^2 + 8378^2 .

It is a cyclic number.

It is not a de Polignac number, because 146316509 - 2⁴ = 146316493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146316503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73158254 + 73158255.

It is an arithmetic number, because the mean of its divisors is an integer number (73158255).

Almost surely, 2^146316509 is an apocalyptic number.

It is an amenable number.

146316509 is a deficient number, since it is larger than the sum of its proper divisors (1).

146316509 is an equidigital number, since it uses as much as digits as its factorization.

146316509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 146316509 is about 12096.1361186124. The cubic root of 146316509 is about 526.9439754074.

The spelling of 146316509 in words is "one hundred forty-six million, three hundred sixteen thousand, five hundred nine".