8279038521 has 24 divisors (see below), whose sum is σ = 12882562056. Its totient is φ = 5093187840.

The previous prime is 8279038423. The next prime is 8279038541. The reversal of 8279038521 is 1258309728.

It is a happy number.

8279038521 is a `hidden beast` number, since 8 + 2 + 7 + 90 + 38 + 521 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 453690000 + 7825348521 = 21300^2 + 88461^2 .

It is not a de Polignac number, because 8279038521 - 2²⁵ = 8245484089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8279038541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 439231 + ... + 457691.

It is an arithmetic number, because the mean of its divisors is an integer number (536773419).

Almost surely, 2^8279038521 is an apocalyptic number.

It is an amenable number.

8279038521 is a deficient number, since it is larger than the sum of its proper divisors (4603523535).

8279038521 is a wasteful number, since it uses less digits than its factorization.

8279038521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22313 (or 22310 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 8279038521 is about 90989.2220045869. Note that the first 3 decimals coincide. The cubic root of 8279038521 is about 2022.9879742756.

The spelling of 8279038521 in words is "eight billion, two hundred seventy-nine million, thirty-eight thousand, five hundred twenty-one".