340673639 has 2 divisors, whose sum is σ = 340673640. Its totient is φ = 340673638.

The previous prime is 340673587. The next prime is 340673681. The reversal of 340673639 is 936376043.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340673639 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 340673596 and 340673605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340673339) 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 as a sum of consecutive naturals, namely, 170336819 + 170336820.

It is an arithmetic number, because the mean of its divisors is an integer number (170336820).

Almost surely, 2^340673639 is an apocalyptic number.

340673639 is a deficient number, since it is larger than the sum of its proper divisors (1).

340673639 is an equidigital number, since it uses as much as digits as its factorization.

340673639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 41.

The square root of 340673639 is about 18457.3464777578. The cubic root of 340673639 is about 698.4138501091.

The spelling of 340673639 in words is "three hundred forty million, six hundred seventy-three thousand, six hundred thirty-nine".