382939681 has 4 divisors (see below), whose sum is σ = 390165012. Its totient is φ = 375714352.

The previous prime is 382939679. The next prime is 382939703. The reversal of 382939681 is 186939283.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 231526656 + 151413025 = 15216^2 + 12305^2 .

It is a cyclic number.

It is not a de Polignac number, because 382939681 - 2¹ = 382939679 is a prime.

It is a super-2 number, since 2×382939681² = 293285598568763522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (382939981) 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 3 ways as a sum of consecutive naturals, for example, 3612586 + ... + 3612691.

It is an arithmetic number, because the mean of its divisors is an integer number (97541253).

Almost surely, 2^382939681 is an apocalyptic number.

It is an amenable number.

382939681 is a deficient number, since it is larger than the sum of its proper divisors (7225331).

382939681 is an equidigital number, since it uses as much as digits as its factorization.

382939681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7225330.

The product of its digits is 559872, while the sum is 49.

The square root of 382939681 is about 19568.8446516395. The cubic root of 382939681 is about 726.1786178253.

It can be divided in two parts, 38293 and 9681, that added together give a palindrome (47974).

The spelling of 382939681 in words is "three hundred eighty-two million, nine hundred thirty-nine thousand, six hundred eighty-one".