343400039 has 2 divisors, whose sum is σ = 343400040. Its totient is φ = 343400038.

The previous prime is 343400023. The next prime is 343400041. The reversal of 343400039 is 930004343.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 343400039 - 2⁴ = 343400023 is a prime.

Together with 343400041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 343399990 and 343400017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343400839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171700019 + 171700020.

It is an arithmetic number, because the mean of its divisors is an integer number (171700020).

Almost surely, 2^343400039 is an apocalyptic number.

343400039 is a deficient number, since it is larger than the sum of its proper divisors (1).

343400039 is an equidigital number, since it uses as much as digits as its factorization.

343400039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 343400039 is about 18531.0560681252. The cubic root of 343400039 is about 700.2720296460.

The spelling of 343400039 in words is "three hundred forty-three million, four hundred thousand, thirty-nine".