343705979 has 2 divisors, whose sum is σ = 343705980. Its totient is φ = 343705978.

The previous prime is 343705969. The next prime is 343705981. The reversal of 343705979 is 979507343.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343705979 is a prime.

Together with 343705981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343705919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171852989 + 171852990.

It is an arithmetic number, because the mean of its divisors is an integer number (171852990).

Almost surely, 2^343705979 is an apocalyptic number.

343705979 is a deficient number, since it is larger than the sum of its proper divisors (1).

343705979 is an equidigital number, since it uses as much as digits as its factorization.

343705979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420, while the sum is 47.

The square root of 343705979 is about 18539.3090216437. The cubic root of 343705979 is about 700.4799287028.

The spelling of 343705979 in words is "three hundred forty-three million, seven hundred five thousand, nine hundred seventy-nine".