381821471783 has 2 divisors, whose sum is σ = 381821471784. Its totient is φ = 381821471782.

The previous prime is 381821471777. The next prime is 381821471797. The reversal of 381821471783 is 387174128183.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (387174128183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381821471783 - 2²⁶ = 381754362919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381821471723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190910735891 + 190910735892.

It is an arithmetic number, because the mean of its divisors is an integer number (190910735892).

Almost surely, 2^381821471783 is an apocalyptic number.

381821471783 is a deficient number, since it is larger than the sum of its proper divisors (1).

381821471783 is an equidigital number, since it uses as much as digits as its factorization.

381821471783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 53.

The spelling of 381821471783 in words is "three hundred eighty-one billion, eight hundred twenty-one million, four hundred seventy-one thousand, seven hundred eighty-three".