8771958421 has 4 divisors (see below), whose sum is σ = 8775175500. Its totient is φ = 8768741344.

The previous prime is 8771958383. The next prime is 8771958439. The reversal of 8771958421 is 1248591778.

8771958421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7239627396 + 1532331025 = 85086^2 + 39145^2 .

It is a cyclic number.

It is not a de Polignac number, because 8771958421 - 2¹¹ = 8771956373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8771958491) 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, 1604446 + ... + 1609903.

It is an arithmetic number, because the mean of its divisors is an integer number (2193793875).

Almost surely, 2^8771958421 is an apocalyptic number.

It is an amenable number.

8771958421 is a deficient number, since it is larger than the sum of its proper divisors (3217079).

8771958421 is a wasteful number, since it uses less digits than its factorization.

8771958421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217078.

The product of its digits is 1128960, while the sum is 52.

The square root of 8771958421 is about 93658.7338212513. The cubic root of 8771958421 is about 2062.3649607871.

The spelling of 8771958421 in words is "eight billion, seven hundred seventy-one million, nine hundred fifty-eight thousand, four hundred twenty-one".