381011 has 2 divisors, whose sum is σ = 381012. Its totient is φ = 381010.

The previous prime is 381001. The next prime is 381019. The reversal of 381011 is 110183.

It is a strong prime.

It is an emirp because it is prime and its reverse (110183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381011 - 2¹⁴ = 364627 is a prime.

It is a super-3 number, since 3×381011³ = 165933394353912993, which contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190505 + 190506.

It is an arithmetic number, because the mean of its divisors is an integer number (190506).

2³⁸¹⁰¹¹ is an apocalyptic number.

381011 is a deficient number, since it is larger than the sum of its proper divisors (1).

381011 is an equidigital number, since it uses as much as digits as its factorization.

381011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 381011 is about 617.2608848777. The cubic root of 381011 is about 72.4957429129.

Adding to 381011 its reverse (110183), we get a palindrome (491194).

The spelling of 381011 in words is "three hundred eighty-one thousand, eleven".