387917 has 2 divisors, whose sum is σ = 387918. Its totient is φ = 387916.

The previous prime is 387913. The next prime is 387953. The reversal of 387917 is 719783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343396 + 44521 = 586^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 387917 - 2² = 387913 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 387917.

It is not a weakly prime, because it can be changed into another prime (387911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193958 + 193959.

It is an arithmetic number, because the mean of its divisors is an integer number (193959).

2³⁸⁷⁹¹⁷ is an apocalyptic number.

It is an amenable number.

387917 is a deficient number, since it is larger than the sum of its proper divisors (1).

387917 is an equidigital number, since it uses as much as digits as its factorization.

387917 is an evil number, because the sum of its binary digits is even.

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

The square root of 387917 is about 622.8298322977. The cubic root of 387917 is about 72.9311291404.

The spelling of 387917 in words is "three hundred eighty-seven thousand, nine hundred seventeen".