343086389 has 2 divisors, whose sum is σ = 343086390. Its totient is φ = 343086388.

The previous prime is 343086353. The next prime is 343086407. The reversal of 343086389 is 983680343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221712100 + 121374289 = 14890^2 + 11017^2 .

It is a cyclic number.

It is not a de Polignac number, because 343086389 - 2¹² = 343082293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343086589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171543194 + 171543195.

It is an arithmetic number, because the mean of its divisors is an integer number (171543195).

Almost surely, 2^343086389 is an apocalyptic number.

It is an amenable number.

343086389 is a deficient number, since it is larger than the sum of its proper divisors (1).

343086389 is an equidigital number, since it uses as much as digits as its factorization.

343086389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 343086389 is about 18522.5913143923. The cubic root of 343086389 is about 700.0587630941.

The spelling of 343086389 in words is "three hundred forty-three million, eighty-six thousand, three hundred eighty-nine".