340811309 has 4 divisors (see below), whose sum is σ = 355629216. Its totient is φ = 325993404.

The previous prime is 340811297. The next prime is 340811323. The reversal of 340811309 is 903118043.

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 a de Polignac number, because none of the positive numbers 2^k-340811309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340811369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7408919 + ... + 7408964.

It is an arithmetic number, because the mean of its divisors is an integer number (88907304).

Almost surely, 2^340811309 is an apocalyptic number.

It is an amenable number.

340811309 is a deficient number, since it is larger than the sum of its proper divisors (14817907).

340811309 is a wasteful number, since it uses less digits than its factorization.

340811309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14817906.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 340811309 is about 18461.0755103813. The cubic root of 340811309 is about 698.5079163696.

The spelling of 340811309 in words is "three hundred forty million, eight hundred eleven thousand, three hundred nine".