8662729 has 2 divisors, whose sum is σ = 8662730. Its totient is φ = 8662728.

The previous prime is 8662657. The next prime is 8662747. The reversal of 8662729 is 9272668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5593225 + 3069504 = 2365^2 + 1752^2 .

It is a cyclic number.

It is not a de Polignac number, because 8662729 - 2⁹ = 8662217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8662691 and 8662700.

It is not a weakly prime, because it can be changed into another prime (8662769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4331364 + 4331365.

It is an arithmetic number, because the mean of its divisors is an integer number (4331365).

Almost surely, 2^8662729 is an apocalyptic number.

It is an amenable number.

8662729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8662729 is an equidigital number, since it uses as much as digits as its factorization.

8662729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 8662729 is about 2943.2514333641. The cubic root of 8662729 is about 205.3768914334.

The spelling of 8662729 in words is "eight million, six hundred sixty-two thousand, seven hundred twenty-nine".