340811729 has 4 divisors (see below), whose sum is σ = 343827876. Its totient is φ = 337795584.

The previous prime is 340811719. The next prime is 340811743. The reversal of 340811729 is 927118043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 927118043 = 4549 ⋅203807.

It can be written as a sum of positive squares in 2 ways, for example, as 3097600 + 337714129 = 1760^2 + 18377^2 .

It is a cyclic number.

It is not a de Polignac number, because 340811729 - 2⁸ = 340811473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340811719) 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, 1507904 + ... + 1508129.

It is an arithmetic number, because the mean of its divisors is an integer number (85956969).

Almost surely, 2^340811729 is an apocalyptic number.

It is an amenable number.

340811729 is a deficient number, since it is larger than the sum of its proper divisors (3016147).

340811729 is a wasteful number, since it uses less digits than its factorization.

340811729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016146.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 340811729 is about 18461.0868856630. The cubic root of 340811729 is about 698.5082033057.

The spelling of 340811729 in words is "three hundred forty million, eight hundred eleven thousand, seven hundred twenty-nine".