381290771 has 2 divisors, whose sum is σ = 381290772. Its totient is φ = 381290770.

The previous prime is 381290759. The next prime is 381290779. The reversal of 381290771 is 177092183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381290771 - 2¹⁰ = 381289747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381290779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190645385 + 190645386.

It is an arithmetic number, because the mean of its divisors is an integer number (190645386).

Almost surely, 2^381290771 is an apocalyptic number.

381290771 is a deficient number, since it is larger than the sum of its proper divisors (1).

381290771 is an equidigital number, since it uses as much as digits as its factorization.

381290771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 381290771 is about 19526.6682001820. The cubic root of 381290771 is about 725.1348277189.

The spelling of 381290771 in words is "three hundred eighty-one million, two hundred ninety thousand, seven hundred seventy-one".