2381147209 has 9 divisors (see below), whose sum is σ = 2770303341. Its totient is φ = 2040690540.

The previous prime is 2381147179. The next prime is 2381147221. The reversal of 2381147209 is 9027411832.

The square root of 2381147209 is 48797.

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

It is not a de Polignac number, because 2381147209 - 2¹⁵ = 2381114441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2381147009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 338094 + ... + 345064.

Almost surely, 2^2381147209 is an apocalyptic number.

2381147209 is the 48797-th square number.

2381147209 is the 24399-th centered octagonal number.

It is an amenable number.

2381147209 is a deficient number, since it is larger than the sum of its proper divisors (389156132).

2381147209 is an frugal number, since it uses more digits than its factorization.

2381147209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13956 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The cubic root of 2381147209 is about 1335.3509359961.

The spelling of 2381147209 in words is "two billion, three hundred eighty-one million, one hundred forty-seven thousand, two hundred nine".