343426561 has 2 divisors, whose sum is σ = 343426562. Its totient is φ = 343426560.

The previous prime is 343426553. The next prime is 343426579. The reversal of 343426561 is 165624343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267126336 + 76300225 = 16344^2 + 8735^2 .

It is a cyclic number.

It is not a de Polignac number, because 343426561 - 2³ = 343426553 is a prime.

It is not a weakly prime, because it can be changed into another prime (343426541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171713280 + 171713281.

It is an arithmetic number, because the mean of its divisors is an integer number (171713281).

Almost surely, 2^343426561 is an apocalyptic number.

It is an amenable number.

343426561 is a deficient number, since it is larger than the sum of its proper divisors (1).

343426561 is an equidigital number, since it uses as much as digits as its factorization.

343426561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

The square root of 343426561 is about 18531.7716638210. The cubic root of 343426561 is about 700.2900573440.

The spelling of 343426561 in words is "three hundred forty-three million, four hundred twenty-six thousand, five hundred sixty-one".