387779 has 8 divisors (see below), whose sum is σ = 457728. Its totient is φ = 321480.

The previous prime is 387763. The next prime is 387781. The reversal of 387779 is 977783.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 387779 - 2⁴ = 387763 is a prime.

It is a Duffinian number.

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 387779.

It is not an unprimeable number, because it can be changed into a prime (387749) 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 7 ways as a sum of consecutive naturals, for example, 677 + ... + 1110.

It is an arithmetic number, because the mean of its divisors is an integer number (57216).

2³⁸⁷⁷⁷⁹ is an apocalyptic number.

387779 is a deficient number, since it is larger than the sum of its proper divisors (69949).

387779 is a wasteful number, since it uses less digits than its factorization.

387779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its digits is 74088, while the sum is 41.

The square root of 387779 is about 622.7190377690. The cubic root of 387779 is about 72.9224797905.

The spelling of 387779 in words is "three hundred eighty-seven thousand, seven hundred seventy-nine".