8772382921 has 9 divisors (see below), whose sum is σ = 8832452661. Its totient is φ = 8712720864.

The previous prime is 8772382907. The next prime is 8772382933. The reversal of 8772382921 is 1292832778.

It is a happy number.

The square root of 8772382921 is 93661.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6274382521 + 2498000400 = 79211^2 + 49980^2 .

It is not a de Polignac number, because 8772382921 - 2⁷ = 8772382793 is a prime.

It is a super-2 number, since 2×8772382921² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8772382951) 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, 21448165 + ... + 21448573.

It is an arithmetic number, because the mean of its divisors is an integer number (981383629).

Almost surely, 2^8772382921 is an apocalyptic number.

8772382921 is the 93661-st square number.

8772382921 is the 46831-st centered octagonal number.

It is an amenable number.

8772382921 is a deficient number, since it is larger than the sum of its proper divisors (60069740).

8772382921 is an frugal number, since it uses more digits than its factorization.

8772382921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 638 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The cubic root of 8772382921 is about 2062.3982281512.

Multiplying 8772382921 by its sum of digits (49), we get a square (429846763129 = 655627²).

The spelling of 8772382921 in words is "eight billion, seven hundred seventy-two million, three hundred eighty-two thousand, nine hundred twenty-one".