8470729 has 2 divisors, whose sum is σ = 8470730. Its totient is φ = 8470728.

The previous prime is 8470711. The next prime is 8470747. The reversal of 8470729 is 9270748.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (8470711) and next prime (8470747).

It can be written as a sum of positive squares in only one way, i.e., 8277129 + 193600 = 2877^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 8470729 - 2¹³ = 8462537 is a prime.

It is not a weakly prime, because it can be changed into another prime (8470829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4235364 + 4235365.

It is an arithmetic number, because the mean of its divisors is an integer number (4235365).

Almost surely, 2^8470729 is an apocalyptic number.

It is an amenable number.

8470729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8470729 is an equidigital number, since it uses as much as digits as its factorization.

8470729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 8470729 is about 2910.4516831585. The cubic root of 8470729 is about 203.8482226808.

The spelling of 8470729 in words is "eight million, four hundred seventy thousand, seven hundred twenty-nine".