340340647 has 2 divisors, whose sum is σ = 340340648. Its totient is φ = 340340646.

The previous prime is 340340641. The next prime is 340340659. The reversal of 340340647 is 746043043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340340647 - 2²⁷ = 206122919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340340641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170170323 + 170170324.

It is an arithmetic number, because the mean of its divisors is an integer number (170170324).

Almost surely, 2^340340647 is an apocalyptic number.

340340647 is a deficient number, since it is larger than the sum of its proper divisors (1).

340340647 is an equidigital number, since it uses as much as digits as its factorization.

340340647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 31.

The square root of 340340647 is about 18448.3236907856. The cubic root of 340340647 is about 698.1862206779.

The spelling of 340340647 in words is "three hundred forty million, three hundred forty thousand, six hundred forty-seven".