847057009 has 2 divisors, whose sum is σ = 847057010. Its totient is φ = 847057008.

The previous prime is 847056961. The next prime is 847057019. The reversal of 847057009 is 900750748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846810000 + 247009 = 29100^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 847057009 - 2¹⁹ = 846532721 is a prime.

It is not a weakly prime, because it can be changed into another prime (847057019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423528504 + 423528505.

It is an arithmetic number, because the mean of its divisors is an integer number (423528505).

Almost surely, 2^847057009 is an apocalyptic number.

It is an amenable number.

847057009 is a deficient number, since it is larger than the sum of its proper divisors (1).

847057009 is an equidigital number, since it uses as much as digits as its factorization.

847057009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 847057009 is about 29104.2438314415. The cubic root of 847057009 is about 946.1737173658.

The spelling of 847057009 in words is "eight hundred forty-seven million, fifty-seven thousand, nine".