387697 has 4 divisors (see below), whose sum is σ = 389620. Its totient is φ = 385776.

The previous prime is 387683. The next prime is 387707. The reversal of 387697 is 796783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796783 = 13 ⋅61291.

It can be written as a sum of positive squares in 2 ways, for example, as 269361 + 118336 = 519^2 + 344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387697 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387677) 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 in 3 ways as a sum of consecutive naturals, for example, 618 + ... + 1075.

It is an arithmetic number, because the mean of its divisors is an integer number (97405).

2³⁸⁷⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

387697 is a deficient number, since it is larger than the sum of its proper divisors (1923).

387697 is a wasteful number, since it uses less digits than its factorization.

387697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922.

The product of its digits is 63504, while the sum is 40.

The square root of 387697 is about 622.6531940013. The cubic root of 387697 is about 72.9173393498.

The spelling of 387697 in words is "three hundred eighty-seven thousand, six hundred ninety-seven".