387982832857 has 2 divisors, whose sum is σ = 387982832858. Its totient is φ = 387982832856.

The previous prime is 387982832851. The next prime is 387982832893. The reversal of 387982832857 is 758238289783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317424067216 + 70558765641 = 563404^2 + 265629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387982832857 is a prime.

It is not a weakly prime, because it can be changed into another prime (387982832851) 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, 193991416428 + 193991416429.

It is an arithmetic number, because the mean of its divisors is an integer number (193991416429).

Almost surely, 2^387982832857 is an apocalyptic number.

It is an amenable number.

387982832857 is a deficient number, since it is larger than the sum of its proper divisors (1).

387982832857 is an equidigital number, since it uses as much as digits as its factorization.

387982832857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 325140480, while the sum is 70.

The spelling of 387982832857 in words is "three hundred eighty-seven billion, nine hundred eighty-two million, eight hundred thirty-two thousand, eight hundred fifty-seven".