381594131 has 2 divisors, whose sum is σ = 381594132. Its totient is φ = 381594130.

The previous prime is 381594113. The next prime is 381594163. The reversal of 381594131 is 131495183.

Together with previous prime (381594113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (131495183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381594131 is a prime.

It is a super-2 number, since 2×381594131² = 291228161627290322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381594091 and 381594100.

It is not a weakly prime, because it can be changed into another prime (381597131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190797065 + 190797066.

It is an arithmetic number, because the mean of its divisors is an integer number (190797066).

Almost surely, 2^381594131 is an apocalyptic number.

381594131 is a deficient number, since it is larger than the sum of its proper divisors (1).

381594131 is an equidigital number, since it uses as much as digits as its factorization.

381594131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 381594131 is about 19534.4344939903. The cubic root of 381594131 is about 725.3270857059.

The spelling of 381594131 in words is "three hundred eighty-one million, five hundred ninety-four thousand, one hundred thirty-one".