987875121305 has 4 divisors (see below), whose sum is σ = 1185450145572. Its totient is φ = 790300097040.

The previous prime is 987875121269. The next prime is 987875121407. The reversal of 987875121305 is 503121578789.

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 562848053824 + 425027067481 = 750232^2 + 651941^2 .

It is not a de Polignac number, because 987875121305 - 2⁶ = 987875121241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 98787512126 + ... + 98787512135.

It is an arithmetic number, because the mean of its divisors is an integer number (296362536393).

Almost surely, 2^987875121305 is an apocalyptic number.

It is an amenable number.

987875121305 is a deficient number, since it is larger than the sum of its proper divisors (197575024267).

987875121305 is a wasteful number, since it uses less digits than its factorization.

987875121305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197575024266.

The product of its (nonzero) digits is 4233600, while the sum is 56.

The spelling of 987875121305 in words is "nine hundred eighty-seven billion, eight hundred seventy-five million, one hundred twenty-one thousand, three hundred five".