130820209 has 8 divisors (see below), whose sum is σ = 141818432. Its totient is φ = 119955600.

The previous prime is 130820177. The next prime is 130820231. The reversal of 130820209 is 902028031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 130820209 - 2⁵ = 130820177 is a prime.

It is a super-2 number, since 2×130820209² = 34227854165607362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130820309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31359 + ... + 35284.

It is an arithmetic number, because the mean of its divisors is an integer number (17727304).

Almost surely, 2^130820209 is an apocalyptic number.

It is an amenable number.

130820209 is a deficient number, since it is larger than the sum of its proper divisors (10998223).

130820209 is a wasteful number, since it uses less digits than its factorization.

130820209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66807.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 130820209 is about 11437.6662392290. Note that the first 3 decimals coincide. The cubic root of 130820209 is about 507.6428568850.

The spelling of 130820209 in words is "one hundred thirty million, eight hundred twenty thousand, two hundred nine".