381311773 has 2 divisors, whose sum is σ = 381311774. Its totient is φ = 381311772.

The previous prime is 381311759. The next prime is 381311783. The reversal of 381311773 is 377113183.

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., 339554329 + 41757444 = 18427^2 + 6462^2 .

It is a cyclic number.

It is not a de Polignac number, because 381311773 - 2¹³ = 381303581 is a prime.

It is equal to p_20391937 and since 381311773 and 20391937 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381311713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190655886 + 190655887.

It is an arithmetic number, because the mean of its divisors is an integer number (190655887).

Almost surely, 2^381311773 is an apocalyptic number.

It is an amenable number.

381311773 is a deficient number, since it is larger than the sum of its proper divisors (1).

381311773 is an equidigital number, since it uses as much as digits as its factorization.

381311773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

The square root of 381311773 is about 19527.2059701331. The cubic root of 381311773 is about 725.1481412696.

The spelling of 381311773 in words is "three hundred eighty-one million, three hundred eleven thousand, seven hundred seventy-three".