4817886921 has 27 divisors (see below), whose sum is σ = 7398048853. Its totient is φ = 3020766720.

The previous prime is 4817886919. The next prime is 4817886937. The reversal of 4817886921 is 1296887184.

The square root of 4817886921 is 69411.

It is a perfect power (a square), and thus also a powerful number.

4817886921 is a `hidden beast` number, since 481 + 7 + 88 + 69 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20385225 + 4797501696 = 4515^2 + 69264^2 .

It is not a de Polignac number, because 4817886921 - 2¹ = 4817886919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4817886911) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3539281 + ... + 3540641.

Almost surely, 2^4817886921 is an apocalyptic number.

4817886921 is the 69411-st square number.

4817886921 is the 34706-th centered octagonal number.

It is an amenable number.

4817886921 is a deficient number, since it is larger than the sum of its proper divisors (2580161932).

4817886921 is an equidigital number, since it uses as much as digits as its factorization.

4817886921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762 (or 1381 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The cubic root of 4817886921 is about 1688.9580684653.

The spelling of 4817886921 in words is "four billion, eight hundred seventeen million, eight hundred eighty-six thousand, nine hundred twenty-one".