387971 has 2 divisors, whose sum is σ = 387972. Its totient is φ = 387970.

The previous prime is 387967. The next prime is 387973. The reversal of 387971 is 179783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 387971 - 2² = 387967 is a prime.

Together with 387973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (387973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193985 + 193986.

It is an arithmetic number, because the mean of its divisors is an integer number (193986).

2³⁸⁷⁹⁷¹ is an apocalyptic number.

387971 is a deficient number, since it is larger than the sum of its proper divisors (1).

387971 is an equidigital number, since it uses as much as digits as its factorization.

387971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 387971 is about 622.8731813138. The cubic root of 387971 is about 72.9345131102.

The spelling of 387971 in words is "three hundred eighty-seven thousand, nine hundred seventy-one".