8373729 has 32 divisors (see below), whose sum is σ = 14129920. Its totient is φ = 4292352.

The previous prime is 8373709. The next prime is 8373731. The reversal of 8373729 is 9273738.

8373729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8373729 - 2⁵ = 8373697 is a prime.

It is a super-3 number, since 3×8373729³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

8373729 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8373709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9687 + ... + 10515.

It is an arithmetic number, because the mean of its divisors is an integer number (441560).

Almost surely, 2^8373729 is an apocalyptic number.

It is an amenable number.

8373729 is a deficient number, since it is larger than the sum of its proper divisors (5756191).

8373729 is a wasteful number, since it uses less digits than its factorization.

8373729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

The product of its digits is 63504, while the sum is 39.

The square root of 8373729 is about 2893.7396220116. The cubic root of 8373729 is about 203.0671314127.

Subtracting 8373729 from its reverse (9273738), we obtain a palindrome (900009).

The spelling of 8373729 in words is "eight million, three hundred seventy-three thousand, seven hundred twenty-nine".