381311783 has 2 divisors, whose sum is σ = 381311784. Its totient is φ = 381311782.

The previous prime is 381311773. The next prime is 381311789. The reversal of 381311783 is 387113183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381311783 - 2⁶ = 381311719 is a prime.

It is equal to p_20391938 and since 381311783 and 20391938 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 (381311789) 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, 190655891 + 190655892.

It is an arithmetic number, because the mean of its divisors is an integer number (190655892).

Almost surely, 2^381311783 is an apocalyptic number.

381311783 is a deficient number, since it is larger than the sum of its proper divisors (1).

381311783 is an equidigital number, since it uses as much as digits as its factorization.

381311783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 381311783 is about 19527.2062261861. The cubic root of 381311783 is about 725.1481476087.

The spelling of 381311783 in words is "three hundred eighty-one million, three hundred eleven thousand, seven hundred eighty-three".