8780987961 has 6 divisors (see below), whose sum is σ = 12683649290. Its totient is φ = 5853991968.

The previous prime is 8780987939. The next prime is 8780987983. The reversal of 8780987961 is 1697890878.

8780987961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8780987939) and next prime (8780987983).

It can be written as a sum of positive squares in only one way, i.e., 4445555625 + 4335432336 = 66675^2 + 65844^2 .

It is not a de Polignac number, because 8780987961 - 2¹³ = 8780979769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8780987461) 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 5 ways as a sum of consecutive naturals, for example, 487832656 + ... + 487832673.

Almost surely, 2^8780987961 is an apocalyptic number.

It is an amenable number.

8780987961 is a deficient number, since it is larger than the sum of its proper divisors (3902661329).

8780987961 is a wasteful number, since it uses less digits than its factorization.

8780987961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975665335 (or 975665332 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The square root of 8780987961 is about 93706.9258966486. The cubic root of 8780987961 is about 2063.0723596745.

The spelling of 8780987961 in words is "eight billion, seven hundred eighty million, nine hundred eighty-seven thousand, nine hundred sixty-one".