381028133 has 2 divisors, whose sum is σ = 381028134. Its totient is φ = 381028132.

The previous prime is 381028121. The next prime is 381028213. The reversal of 381028133 is 331820183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275493604 + 105534529 = 16598^2 + 10273^2 .

It is an emirp because it is prime and its reverse (331820183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381028133 - 2⁸ = 381027877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381028096 and 381028105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381021133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190514066 + 190514067.

It is an arithmetic number, because the mean of its divisors is an integer number (190514067).

Almost surely, 2^381028133 is an apocalyptic number.

It is an amenable number.

381028133 is a deficient number, since it is larger than the sum of its proper divisors (1).

381028133 is an equidigital number, since it uses as much as digits as its factorization.

381028133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 381028133 is about 19519.9419312661. The cubic root of 381028133 is about 724.9682954031.

The spelling of 381028133 in words is "three hundred eighty-one million, twenty-eight thousand, one hundred thirty-three".