381905683 has 2 divisors, whose sum is σ = 381905684. Its totient is φ = 381905682.

The previous prime is 381905677. The next prime is 381905707. The reversal of 381905683 is 386509183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381905683 - 2²¹ = 379808531 is a prime.

It is not a weakly prime, because it can be changed into another prime (381905603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190952841 + 190952842.

It is an arithmetic number, because the mean of its divisors is an integer number (190952842).

Almost surely, 2^381905683 is an apocalyptic number.

381905683 is a deficient number, since it is larger than the sum of its proper divisors (1).

381905683 is an equidigital number, since it uses as much as digits as its factorization.

381905683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 381905683 is about 19542.4072979764. The cubic root of 381905683 is about 725.5244294403.

The spelling of 381905683 in words is "three hundred eighty-one million, nine hundred five thousand, six hundred eighty-three".