8729997 has 8 divisors (see below), whose sum is σ = 11799744. Its totient is φ = 5740128.

The previous prime is 8729983. The next prime is 8729999. The reversal of 8729997 is 7999278.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8729997 - 2⁷ = 8729869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8729999) 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 7 ways as a sum of consecutive naturals, for example, 19713 + ... + 20150.

It is an arithmetic number, because the mean of its divisors is an integer number (1474968).

Almost surely, 2^8729997 is an apocalyptic number.

It is an amenable number.

8729997 is a deficient number, since it is larger than the sum of its proper divisors (3069747).

8729997 is a wasteful number, since it uses less digits than its factorization.

8729997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39939.

The product of its digits is 571536, while the sum is 51.

The square root of 8729997 is about 2954.6568328657. The cubic root of 8729997 is about 205.9071202873.

The spelling of 8729997 in words is "eight million, seven hundred twenty-nine thousand, nine hundred ninety-seven".