847040489 has 2 divisors, whose sum is σ = 847040490. Its totient is φ = 847040488.

The previous prime is 847040479. The next prime is 847040507. The reversal of 847040489 is 984040748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432307264 + 414733225 = 20792^2 + 20365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-847040489 is a prime.

It is not a weakly prime, because it can be changed into another prime (847040459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423520244 + 423520245.

It is an arithmetic number, because the mean of its divisors is an integer number (423520245).

Almost surely, 2^847040489 is an apocalyptic number.

It is an amenable number.

847040489 is a deficient number, since it is larger than the sum of its proper divisors (1).

847040489 is an equidigital number, since it uses as much as digits as its factorization.

847040489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 847040489 is about 29103.9600226498. The cubic root of 847040489 is about 946.1675663074.

The spelling of 847040489 in words is "eight hundred forty-seven million, forty thousand, four hundred eighty-nine".