8726528021 has 2 divisors, whose sum is σ = 8726528022. Its totient is φ = 8726528020.

The previous prime is 8726527951. The next prime is 8726528071. The reversal of 8726528021 is 1208256278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8251723921 + 474804100 = 90839^2 + 21790^2 .

It is a cyclic number.

It is not a de Polignac number, because 8726528021 - 2¹⁴ = 8726511637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8726528021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8726528071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4363264010 + 4363264011.

It is an arithmetic number, because the mean of its divisors is an integer number (4363264011).

Almost surely, 2^8726528021 is an apocalyptic number.

It is an amenable number.

8726528021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8726528021 is an equidigital number, since it uses as much as digits as its factorization.

8726528021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 8726528021 is about 93415.8874121528. The cubic root of 8726528021 is about 2058.7984337425.

The spelling of 8726528021 in words is "eight billion, seven hundred twenty-six million, five hundred twenty-eight thousand, twenty-one".