387878904017 has 12 divisors (see below), whose sum is σ = 426752804100. Its totient is φ = 352280924160.

The previous prime is 387878904013. The next prime is 387878904019. The reversal of 387878904017 is 710409878783.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 170801184961 + 217077719056 = 413281^2 + 465916^2 .

It is not a de Polignac number, because 387878904017 - 2² = 387878904013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387878904013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1401008 + ... + 1654865.

It is an arithmetic number, because the mean of its divisors is an integer number (35562733675).

Almost surely, 2^387878904017 is an apocalyptic number.

It is an amenable number.

387878904017 is a deficient number, since it is larger than the sum of its proper divisors (38873900083).

387878904017 is a wasteful number, since it uses less digits than its factorization.

387878904017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056944 (or 3056933 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 62.

The spelling of 387878904017 in words is "three hundred eighty-seven billion, eight hundred seventy-eight million, nine hundred four thousand, seventeen".