147845809 has 2 divisors, whose sum is σ = 147845810. Its totient is φ = 147845808.

The previous prime is 147845791. The next prime is 147845833. The reversal of 147845809 is 908548741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81504784 + 66341025 = 9028^2 + 8145^2 .

It is a cyclic number.

It is not a de Polignac number, because 147845809 - 2⁹ = 147845297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (147845869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73922904 + 73922905.

It is an arithmetic number, because the mean of its divisors is an integer number (73922905).

Almost surely, 2^147845809 is an apocalyptic number.

It is an amenable number.

147845809 is a deficient number, since it is larger than the sum of its proper divisors (1).

147845809 is an equidigital number, since it uses as much as digits as its factorization.

147845809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 147845809 is about 12159.1861980973. The cubic root of 147845809 is about 528.7734887393.

The spelling of 147845809 in words is "one hundred forty-seven million, eight hundred forty-five thousand, eight hundred nine".