381361133 has 2 divisors, whose sum is σ = 381361134. Its totient is φ = 381361132.

The previous prime is 381361121. The next prime is 381361139. The reversal of 381361133 is 331163183.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356341129 + 25020004 = 18877^2 + 5002^2 .

It is a cyclic number.

It is not a de Polignac number, because 381361133 - 2⁶ = 381361069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 381361096 and 381361105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381361139) 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 as a sum of consecutive naturals, namely, 190680566 + 190680567.

It is an arithmetic number, because the mean of its divisors is an integer number (190680567).

Almost surely, 2^381361133 is an apocalyptic number.

It is an amenable number.

381361133 is a deficient number, since it is larger than the sum of its proper divisors (1).

381361133 is an equidigital number, since it uses as much as digits as its factorization.

381361133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 381361133 is about 19528.4698069255. The cubic root of 381361133 is about 725.1794295491.

It can be divided in two parts, 3813 and 61133, that added together give a palindrome (64946).

The spelling of 381361133 in words is "three hundred eighty-one million, three hundred sixty-one thousand, one hundred thirty-three".