389729 has 4 divisors (see below), whose sum is σ = 396180. Its totient is φ = 383280.

The previous prime is 389723. The next prime is 389743. The reversal of 389729 is 927983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5329 + 384400 = 73^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 389729 - 2⁴ = 389713 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 389692 and 389701.

It is not an unprimeable number, because it can be changed into a prime (389723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3134 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (99045).

2³⁸⁹⁷²⁹ is an apocalyptic number.

It is an amenable number.

389729 is a deficient number, since it is larger than the sum of its proper divisors (6451).

389729 is an equidigital number, since it uses as much as digits as its factorization.

389729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450.

The product of its digits is 27216, while the sum is 38.

The square root of 389729 is about 624.2827884861. The cubic root of 389729 is about 73.0445090424.

The spelling of 389729 in words is "three hundred eighty-nine thousand, seven hundred twenty-nine".