387749 has 2 divisors, whose sum is σ = 387750. Its totient is φ = 387748.

The previous prime is 387743. The next prime is 387763. The reversal of 387749 is 947783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351649 + 36100 = 593^2 + 190^2 .

It is an emirp because it is prime and its reverse (947783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387749 - 2⁸ = 387493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387743) 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, 193874 + 193875.

It is an arithmetic number, because the mean of its divisors is an integer number (193875).

2³⁸⁷⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

387749 is a deficient number, since it is larger than the sum of its proper divisors (1).

387749 is an equidigital number, since it uses as much as digits as its factorization.

387749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 387749 is about 622.6949493934. The cubic root of 387749 is about 72.9205992255.

It can be divided in two parts, 38774 and 9, that added together give a palindrome (38783).

The spelling of 387749 in words is "three hundred eighty-seven thousand, seven hundred forty-nine".