8342812921 has 9 divisors (see below), whose sum is σ = 8399736783. Its totient is φ = 8286274080.

The previous prime is 8342812903. The next prime is 8342812927. The reversal of 8342812921 is 1292182438.

The square root of 8342812921 is 91339.

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

It can be written as a sum of positive squares in only one way, i.e., 6274382521 + 2068430400 = 79211^2 + 45480^2 .

It is not a de Polignac number, because 8342812921 - 2¹⁵ = 8342780153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8342812927) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22012510 + ... + 22012888.

It is an arithmetic number, because the mean of its divisors is an integer number (933304087).

Almost surely, 2^8342812921 is an apocalyptic number.

8342812921 is the 91339-th square number.

8342812921 is the 45670-th centered octagonal number.

It is an amenable number.

8342812921 is a deficient number, since it is larger than the sum of its proper divisors (56923862).

8342812921 is an frugal number, since it uses more digits than its factorization.

8342812921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240 (or 620 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The cubic root of 8342812921 is about 2028.1691307689.

The spelling of 8342812921 in words is "eight billion, three hundred forty-two million, eight hundred twelve thousand, nine hundred twenty-one".