381158849 has 2 divisors, whose sum is σ = 381158850. Its totient is φ = 381158848.

The previous prime is 381158839. The next prime is 381158891. The reversal of 381158849 is 948851183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 368908849 + 12250000 = 19207^2 + 3500^2 .

It is a cyclic number.

It is not a de Polignac number, because 381158849 - 2¹⁶ = 381093313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381158809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190579424 + 190579425.

It is an arithmetic number, because the mean of its divisors is an integer number (190579425).

Almost surely, 2^381158849 is an apocalyptic number.

It is an amenable number.

381158849 is a deficient number, since it is larger than the sum of its proper divisors (1).

381158849 is an equidigital number, since it uses as much as digits as its factorization.

381158849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 47.

The square root of 381158849 is about 19523.2899123073. The cubic root of 381158849 is about 725.0511887757.

It can be divided in two parts, 38115 and 8849, that added together give a palindrome (46964).

The spelling of 381158849 in words is "three hundred eighty-one million, one hundred fifty-eight thousand, eight hundred forty-nine".