381181293 has 12 divisors (see below), whose sum is σ = 582983388. Its totient is φ = 239172480.

The previous prime is 381181271. The next prime is 381181303. The reversal of 381181293 is 392181183.

It can be written as a sum of positive squares in 2 ways, for example, as 250810569 + 130370724 = 15837^2 + 11418^2 .

It is not a de Polignac number, because 381181293 - 2⁹ = 381180781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381181993) 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 11 ways as a sum of consecutive naturals, for example, 1245538 + ... + 1245843.

It is an arithmetic number, because the mean of its divisors is an integer number (48581949).

Almost surely, 2^381181293 is an apocalyptic number.

It is an amenable number.

381181293 is a deficient number, since it is larger than the sum of its proper divisors (201802095).

381181293 is a wasteful number, since it uses less digits than its factorization.

381181293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491404 (or 2491401 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 381181293 is about 19523.8647045097. The cubic root of 381181293 is about 725.0654197012.

The spelling of 381181293 in words is "three hundred eighty-one million, one hundred eighty-one thousand, two hundred ninety-three".