146457209 has 2 divisors, whose sum is σ = 146457210. Its totient is φ = 146457208.

The previous prime is 146457203. The next prime is 146457251. The reversal of 146457209 is 902754641.

146457209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91623184 + 54834025 = 9572^2 + 7405^2 .

It is an emirp because it is prime and its reverse (902754641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146457209 - 2¹⁶ = 146391673 is a prime.

It is not a weakly prime, because it can be changed into another prime (146457203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73228604 + 73228605.

It is an arithmetic number, because the mean of its divisors is an integer number (73228605).

Almost surely, 2^146457209 is an apocalyptic number.

It is an amenable number.

146457209 is a deficient number, since it is larger than the sum of its proper divisors (1).

146457209 is an equidigital number, since it uses as much as digits as its factorization.

146457209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 146457209 is about 12101.9506278947. The cubic root of 146457209 is about 527.1128268595.

The spelling of 146457209 in words is "one hundred forty-six million, four hundred fifty-seven thousand, two hundred nine".