343439561 has 2 divisors, whose sum is σ = 343439562. Its totient is φ = 343439560.

The previous prime is 343439549. The next prime is 343439617. The reversal of 343439561 is 165934343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239011600 + 104427961 = 15460^2 + 10219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343439561 is a prime.

It is not a weakly prime, because it can be changed into another prime (343439501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171719780 + 171719781.

It is an arithmetic number, because the mean of its divisors is an integer number (171719781).

Almost surely, 2^343439561 is an apocalyptic number.

It is an amenable number.

343439561 is a deficient number, since it is larger than the sum of its proper divisors (1).

343439561 is an equidigital number, since it uses as much as digits as its factorization.

343439561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 38.

The square root of 343439561 is about 18532.1224094813. The cubic root of 343439561 is about 700.2988934456.

The spelling of 343439561 in words is "three hundred forty-three million, four hundred thirty-nine thousand, five hundred sixty-one".