340544309 has 4 divisors (see below), whose sum is σ = 389193504. Its totient is φ = 291895116.

The previous prime is 340544287. The next prime is 340544311. The reversal of 340544309 is 903445043.

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 340544309 - 2⁸ = 340544053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340544389) 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, 24324587 + ... + 24324600.

It is an arithmetic number, because the mean of its divisors is an integer number (97298376).

Almost surely, 2^340544309 is an apocalyptic number.

It is an amenable number.

340544309 is a deficient number, since it is larger than the sum of its proper divisors (48649195).

340544309 is an equidigital number, since it uses as much as digits as its factorization.

340544309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48649194.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 340544309 is about 18453.8426621666. The cubic root of 340544309 is about 698.3254592609.

The spelling of 340544309 in words is "three hundred forty million, five hundred forty-four thousand, three hundred nine".