387088506689 has 4 divisors (see below), whose sum is σ = 400436386260. Its totient is φ = 373740627120.

The previous prime is 387088506667. The next prime is 387088506751. The reversal of 387088506689 is 986605880783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81398943025 + 305689563664 = 285305^2 + 552892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387088506689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387088506089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6673939742 + ... + 6673939799.

It is an arithmetic number, because the mean of its divisors is an integer number (100109096565).

Almost surely, 2^387088506689 is an apocalyptic number.

It is an amenable number.

387088506689 is a deficient number, since it is larger than the sum of its proper divisors (13347879571).

387088506689 is a wasteful number, since it uses less digits than its factorization.

387088506689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13347879570.

The product of its (nonzero) digits is 139345920, while the sum is 68.

The spelling of 387088506689 in words is "three hundred eighty-seven billion, eighty-eight million, five hundred six thousand, six hundred eighty-nine".