8525729 has 2 divisors, whose sum is σ = 8525730. Its totient is φ = 8525728.

The previous prime is 8525723. The next prime is 8525731. The reversal of 8525729 is 9275258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 3508129 = 2240^2 + 1873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8525729 is a prime.

Together with 8525731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8525692 and 8525701.

It is not a weakly prime, because it can be changed into another prime (8525723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4262864 + 4262865.

It is an arithmetic number, because the mean of its divisors is an integer number (4262865).

Almost surely, 2^8525729 is an apocalyptic number.

It is an amenable number.

8525729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8525729 is an equidigital number, since it uses as much as digits as its factorization.

8525729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 8525729 is about 2919.8851004791. The cubic root of 8525729 is about 204.2884631781.

The spelling of 8525729 in words is "eight million, five hundred twenty-five thousand, seven hundred twenty-nine".