8637959421 has 64 divisors (see below), whose sum is σ = 15784652800. Its totient is φ = 4546300608.

The previous prime is 8637959353. The next prime is 8637959423. The reversal of 8637959421 is 1249597368.

It is not a de Polignac number, because 8637959421 - 2¹⁰ = 8637958397 is a prime.

It is a super-4 number, since 4×8637959421⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8637959423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1192950 + ... + 1200168.

It is an arithmetic number, because the mean of its divisors is an integer number (246635200).

Almost surely, 2^8637959421 is an apocalyptic number.

It is an amenable number.

8637959421 is a deficient number, since it is larger than the sum of its proper divisors (7146693379).

8637959421 is a wasteful number, since it uses less digits than its factorization.

8637959421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735 (or 7729 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 8637959421 is about 92940.6230934568. The cubic root of 8637959421 is about 2051.8095797275.

The spelling of 8637959421 in words is "eight billion, six hundred thirty-seven million, nine hundred fifty-nine thousand, four hundred twenty-one".