387857 has 2 divisors, whose sum is σ = 387858. Its totient is φ = 387856.

The previous prime is 387853. The next prime is 387911. The reversal of 387857 is 758783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261121 + 126736 = 511^2 + 356^2 .

It is an emirp because it is prime and its reverse (758783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387857 - 2² = 387853 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 387857.

It is not a weakly prime, because it can be changed into another prime (387853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193928 + 193929.

It is an arithmetic number, because the mean of its divisors is an integer number (193929).

2³⁸⁷⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

387857 is a deficient number, since it is larger than the sum of its proper divisors (1).

387857 is an equidigital number, since it uses as much as digits as its factorization.

387857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 387857 is about 622.7816631854. The cubic root of 387857 is about 72.9273688056.

The spelling of 387857 in words is "three hundred eighty-seven thousand, eight hundred fifty-seven".