8751697921 has 8 divisors (see below), whose sum is σ = 8879839488. Its totient is φ = 8623692000.

The previous prime is 8751697909. The next prime is 8751697979. The reversal of 8751697921 is 1297961578.

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 8751697921 - 2⁷ = 8751697793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8751697991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99901 + ... + 165781.

It is an arithmetic number, because the mean of its divisors is an integer number (1109979936).

Almost surely, 2^8751697921 is an apocalyptic number.

It is an amenable number.

8751697921 is a deficient number, since it is larger than the sum of its proper divisors (128141567).

8751697921 is a wasteful number, since it uses less digits than its factorization.

8751697921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67823.

The product of its digits is 1905120, while the sum is 55.

The square root of 8751697921 is about 93550.5099986098. The cubic root of 8751697921 is about 2060.7759292239.

The spelling of 8751697921 in words is "eight billion, seven hundred fifty-one million, six hundred ninety-seven thousand, nine hundred twenty-one".