8564729 has 2 divisors, whose sum is σ = 8564730. Its totient is φ = 8564728.

The previous prime is 8564713. The next prime is 8564741. The reversal of 8564729 is 9274658.

8564729 is nontrivially palindromic in base 6.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5396329 + 3168400 = 2323^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 8564729 - 2⁴ = 8564713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8564749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4282364 + 4282365.

It is an arithmetic number, because the mean of its divisors is an integer number (4282365).

Almost surely, 2^8564729 is an apocalyptic number.

It is an amenable number.

8564729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8564729 is an equidigital number, since it uses as much as digits as its factorization.

8564729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 8564729 is about 2926.5558255396. Note that the first 3 decimals coincide. The cubic root of 8564729 is about 204.5994877020.

The spelling of 8564729 in words is "eight million, five hundred sixty-four thousand, seven hundred twenty-nine".