147047809 has 4 divisors (see below), whose sum is σ = 153441216. Its totient is φ = 140654404.

The previous prime is 147047801. The next prime is 147047833. The reversal of 147047809 is 908740741.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 908740741 = 23 ⋅39510467.

It is a cyclic number.

It is not a de Polignac number, because 147047809 - 2³ = 147047801 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147047801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3196669 + ... + 3196714.

It is an arithmetic number, because the mean of its divisors is an integer number (38360304).

Almost surely, 2^147047809 is an apocalyptic number.

It is an amenable number.

147047809 is a deficient number, since it is larger than the sum of its proper divisors (6393407).

147047809 is an equidigital number, since it uses as much as digits as its factorization.

147047809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6393406.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 147047809 is about 12126.3271026309. The cubic root of 147047809 is about 527.8204176257.

The spelling of 147047809 in words is "one hundred forty-seven million, forty-seven thousand, eight hundred nine".