8630729 has 4 divisors (see below), whose sum is σ = 8710020. Its totient is φ = 8551440.

The previous prime is 8630683. The next prime is 8630737. The reversal of 8630729 is 9270368.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5107600 + 3523129 = 2260^2 + 1877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8630729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8630749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39482 + ... + 39699.

It is an arithmetic number, because the mean of its divisors is an integer number (2177505).

Almost surely, 2^8630729 is an apocalyptic number.

It is an amenable number.

8630729 is a deficient number, since it is larger than the sum of its proper divisors (79291).

8630729 is a wasteful number, since it uses less digits than its factorization.

8630729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79290.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 8630729 is about 2937.8102389365. The cubic root of 8630729 is about 205.1236929498.

The spelling of 8630729 in words is "eight million, six hundred thirty thousand, seven hundred twenty-nine".