146271809 has 2 divisors, whose sum is σ = 146271810. Its totient is φ = 146271808.

The previous prime is 146271773. The next prime is 146271821. The reversal of 146271809 is 908172641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82719025 + 63552784 = 9095^2 + 7972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146271809 is a prime.

It is not a weakly prime, because it can be changed into another prime (146274809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73135904 + 73135905.

It is an arithmetic number, because the mean of its divisors is an integer number (73135905).

Almost surely, 2^146271809 is an apocalyptic number.

It is an amenable number.

146271809 is a deficient number, since it is larger than the sum of its proper divisors (1).

146271809 is an equidigital number, since it uses as much as digits as its factorization.

146271809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 146271809 is about 12094.2882800105. The cubic root of 146271809 is about 526.8903091126.

The spelling of 146271809 in words is "one hundred forty-six million, two hundred seventy-one thousand, eight hundred nine".