8861729 has 2 divisors, whose sum is σ = 8861730. Its totient is φ = 8861728.

The previous prime is 8861719. The next prime is 8861747. The reversal of 8861729 is 9271688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7573504 + 1288225 = 2752^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 8861729 - 2⁸ = 8861473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8861719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4430864 + 4430865.

It is an arithmetic number, because the mean of its divisors is an integer number (4430865).

Almost surely, 2^8861729 is an apocalyptic number.

It is an amenable number.

8861729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8861729 is an equidigital number, since it uses as much as digits as its factorization.

8861729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 8861729 is about 2976.8656335146. The cubic root of 8861729 is about 206.9376382582.

Subtracting from 8861729 its sum of digits (41), we obtain a palindrome (8861688).

The spelling of 8861729 in words is "eight million, eight hundred sixty-one thousand, seven hundred twenty-nine".