8377920921 has 8 divisors (see below), whose sum is σ = 11215066464. Its totient is φ = 5563028000.

The previous prime is 8377920907. The next prime is 8377920949. The reversal of 8377920921 is 1290297738.

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 8377920921 - 2¹³ = 8377912729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8377920961) 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, 5562276 + ... + 5563781.

It is an arithmetic number, because the mean of its divisors is an integer number (1401883308).

Almost surely, 2^8377920921 is an apocalyptic number.

It is an amenable number.

8377920921 is a deficient number, since it is larger than the sum of its proper divisors (2837145543).

8377920921 is a wasteful number, since it uses less digits than its factorization.

8377920921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11126311.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 8377920921 is about 91530.9833936028. The cubic root of 8377920921 is about 2031.0101115604.

The spelling of 8377920921 in words is "eight billion, three hundred seventy-seven million, nine hundred twenty thousand, nine hundred twenty-one".