8574047021 has 2 divisors, whose sum is σ = 8574047022. Its totient is φ = 8574047020.

The previous prime is 8574047011. The next prime is 8574047057. The reversal of 8574047021 is 1207404758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6916417225 + 1657629796 = 83165^2 + 40714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8574047021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8574047011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4287023510 + 4287023511.

It is an arithmetic number, because the mean of its divisors is an integer number (4287023511).

Almost surely, 2^8574047021 is an apocalyptic number.

It is an amenable number.

8574047021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8574047021 is an equidigital number, since it uses as much as digits as its factorization.

8574047021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 8574047021 is about 92596.1501413531. The cubic root of 8574047021 is about 2046.7365900624.

The spelling of 8574047021 in words is "eight billion, five hundred seventy-four million, forty-seven thousand, twenty-one".