381912849 has 6 divisors (see below), whose sum is σ = 551651906. Its totient is φ = 254608560.

The previous prime is 381912847. The next prime is 381912851. The reversal of 381912849 is 948219183.

It is an interprime number because it is at equal distance from previous prime (381912847) and next prime (381912851).

It can be written as a sum of positive squares in only one way, i.e., 354945600 + 26967249 = 18840^2 + 5193^2 .

It is not a de Polignac number, because 381912849 - 2¹ = 381912847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381912847) 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 5 ways as a sum of consecutive naturals, for example, 21217372 + ... + 21217389.

Almost surely, 2^381912849 is an apocalyptic number.

It is an amenable number.

381912849 is a deficient number, since it is larger than the sum of its proper divisors (169739057).

381912849 is a wasteful number, since it uses less digits than its factorization.

381912849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42434767 (or 42434764 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 381912849 is about 19542.5906419799. The cubic root of 381912849 is about 725.5289672759.

The spelling of 381912849 in words is "three hundred eighty-one million, nine hundred twelve thousand, eight hundred forty-nine".