8611996921 has 8 divisors (see below), whose sum is σ = 9401092704. Its totient is φ = 7823932320.

The previous prime is 8611996909. The next prime is 8611996937. The reversal of 8611996921 is 1296991168.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8611996921 - 2¹¹ = 8611994873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8611996961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240276 + ... + 273781.

It is an arithmetic number, because the mean of its divisors is an integer number (1175136588).

Almost surely, 2^8611996921 is an apocalyptic number.

It is an amenable number.

8611996921 is a deficient number, since it is larger than the sum of its proper divisors (789095783).

8611996921 is a wasteful number, since it uses less digits than its factorization.

8611996921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515591.

The product of its digits is 419904, while the sum is 52.

The square root of 8611996921 is about 92800.8454756744. The cubic root of 8611996921 is about 2049.7518574127.

The spelling of 8611996921 in words is "eight billion, six hundred eleven million, nine hundred ninety-six thousand, nine hundred twenty-one".