343029989 has 2 divisors, whose sum is σ = 343029990. Its totient is φ = 343029988.

The previous prime is 343029983. The next prime is 343029991. The reversal of 343029989 is 989920343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242829889 + 100200100 = 15583^2 + 10010^2 .

It is an emirp because it is prime and its reverse (989920343) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343029989 is a prime.

Together with 343029991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343029983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171514994 + 171514995.

It is an arithmetic number, because the mean of its divisors is an integer number (171514995).

Almost surely, 2^343029989 is an apocalyptic number.

It is an amenable number.

343029989 is a deficient number, since it is larger than the sum of its proper divisors (1).

343029989 is an equidigital number, since it uses as much as digits as its factorization.

343029989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 343029989 is about 18521.0687866548. The cubic root of 343029989 is about 700.0204000857.

The spelling of 343029989 in words is "three hundred forty-three million, twenty-nine thousand, nine hundred eighty-nine".