8073729 has 8 divisors (see below), whose sum is σ = 11961120. Its totient is φ = 5382468.

The previous prime is 8073647. The next prime is 8073749. The reversal of 8073729 is 9273708.

It is not a de Polignac number, because 8073729 - 2⁸ = 8073473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8073693 and 8073702.

It is not an unprimeable number, because it can be changed into a prime (8073749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149487 + ... + 149540.

It is an arithmetic number, because the mean of its divisors is an integer number (1495140).

Almost surely, 2^8073729 is an apocalyptic number.

It is an amenable number.

8073729 is a deficient number, since it is larger than the sum of its proper divisors (3887391).

8073729 is a wasteful number, since it uses less digits than its factorization.

8073729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299036 (or 299030 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 8073729 is about 2841.4308015505. The cubic root of 8073729 is about 200.6125304504.

The spelling of 8073729 in words is "eight million, seventy-three thousand, seven hundred twenty-nine".