987870052241 has 4 divisors (see below), whose sum is σ = 1045980055332. Its totient is φ = 929760049152.

The previous prime is 987870052219. The next prime is 987870052289. The reversal of 987870052241 is 142250078789.

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 370905360400 + 616964691841 = 609020^2 + 785471^2 .

It is a cyclic number.

It is not a de Polignac number, because 987870052241 - 2¹⁴ = 987870035857 is a prime.

It is a super-2 number, since 2×987870052241² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (987870052541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29055001520 + ... + 29055001553.

It is an arithmetic number, because the mean of its divisors is an integer number (261495013833).

Almost surely, 2^987870052241 is an apocalyptic number.

It is an amenable number.

987870052241 is a deficient number, since it is larger than the sum of its proper divisors (58110003091).

987870052241 is a wasteful number, since it uses less digits than its factorization.

987870052241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58110003090.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 987870052241 in words is "nine hundred eighty-seven billion, eight hundred seventy million, fifty-two thousand, two hundred forty-one".