8345729 has 12 divisors (see below), whose sum is σ = 9772308. Its totient is φ = 7106400.

The previous prime is 8345723. The next prime is 8345737. The reversal of 8345729 is 9275438.

8345729 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1960000 + 6385729 = 1400^2 + 2527^2 .

It is not a de Polignac number, because 8345729 - 2⁸ = 8345473 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

8345729 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 8345692 and 8345701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8345723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8399 + ... + 9339.

It is an arithmetic number, because the mean of its divisors is an integer number (814359).

Almost surely, 2^8345729 is an apocalyptic number.

It is an amenable number.

8345729 is a deficient number, since it is larger than the sum of its proper divisors (1426579).

8345729 is a wasteful number, since it uses less digits than its factorization.

8345729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1129 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 8345729 is about 2888.8975405853. The cubic root of 8345729 is about 202.8405406492.

The spelling of 8345729 in words is "eight million, three hundred forty-five thousand, seven hundred twenty-nine".