8973729 has 6 divisors (see below), whose sum is σ = 12962066. Its totient is φ = 5982480.

The previous prime is 8973709. The next prime is 8973737. The reversal of 8973729 is 9273798.

It can be written as a sum of positive squares in only one way, i.e., 8910225 + 63504 = 2985^2 + 252^2 .

It is not a de Polignac number, because 8973729 - 2⁵ = 8973697 is a prime.

It is a Duffinian number.

It is a Curzon number.

8973729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8973709) 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 5 ways as a sum of consecutive naturals, for example, 498532 + ... + 498549.

Almost surely, 2^8973729 is an apocalyptic number.

It is an amenable number.

8973729 is a deficient number, since it is larger than the sum of its proper divisors (3988337).

8973729 is a wasteful number, since it uses less digits than its factorization.

8973729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997087 (or 997084 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 8973729 is about 2995.6183001177. The cubic root of 8973729 is about 207.8057929017.

The spelling of 8973729 in words is "eight million, nine hundred seventy-three thousand, seven hundred twenty-nine".