340729 has 4 divisors (see below), whose sum is σ = 345600. Its totient is φ = 335860.

The previous prime is 340723. The next prime is 340757. The reversal of 340729 is 927043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 340729 - 2⁷ = 340601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340723) 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 3 ways as a sum of consecutive naturals, for example, 2329 + ... + 2470.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

2³⁴⁰⁷²⁹ is an apocalyptic number.

It is an amenable number.

340729 is a deficient number, since it is larger than the sum of its proper divisors (4871).

340729 is an equidigital number, since it uses as much as digits as its factorization.

340729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4870.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 340729 is about 583.7199671075. The cubic root of 340729 is about 69.8451679858.

The spelling of 340729 in words is "three hundred forty thousand, seven hundred twenty-nine".