2381732809 has 9 divisors (see below), whose sum is σ = 2449700967. Its totient is φ = 2315604744.

The previous prime is 2381732789. The next prime is 2381732831. The reversal of 2381732809 is 9082371832.

The square root of 2381732809 is 48803.

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

It can be written as a sum of positive squares in only one way, i.e., 2131207225 + 250525584 = 46165^2 + 15828^2 .

It is not a de Polignac number, because 2381732809 - 2¹⁷ = 2381601737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2381732209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1805052 + ... + 1806370.

Almost surely, 2^2381732809 is an apocalyptic number.

2381732809 is the 48803-rd square number.

2381732809 is the 24402-nd centered octagonal number.

It is an amenable number.

2381732809 is a deficient number, since it is larger than the sum of its proper divisors (67968158).

2381732809 is an frugal number, since it uses more digits than its factorization.

2381732809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The cubic root of 2381732809 is about 1335.4603954769.

The spelling of 2381732809 in words is "two billion, three hundred eighty-one million, seven hundred thirty-two thousand, eight hundred nine".