147804109209 has 63 divisors (see below), whose sum is σ = 229978220719. Its totient is φ = 94944512880.

The previous prime is 147804109147. The next prime is 147804109223. The reversal of 147804109209 is 902901408741.

It is a happy number.

The square root of 147804109209 is 384453.

It is a perfect power (a square), and thus also a powerful number.

147804109209 is a `hidden beast` number, since 147 + 8 + 0 + 410 + 92 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77504889609 + 70299219600 = 278397^2 + 265140^2 .

It is not a de Polignac number, because 147804109209 - 2¹³ = 147804101017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147804109909) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 301026454 + ... + 301026944.

Almost surely, 2^147804109209 is an apocalyptic number.

147804109209 is the 384453-rd square number.

147804109209 is the 192227-th centered octagonal number.

It is an amenable number.

147804109209 is a deficient number, since it is larger than the sum of its proper divisors (82174111510).

147804109209 is an frugal number, since it uses more digits than its factorization.

147804109209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 147804109209 in words is "one hundred forty-seven billion, eight hundred four million, one hundred nine thousand, two hundred nine".