347561 has 2 divisors, whose sum is σ = 347562. Its totient is φ = 347560.

The previous prime is 347539. The next prime is 347563. The reversal of 347561 is 165743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337561 + 10000 = 581^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-347561 is a prime.

Together with 347563, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 347561.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 347561.

It is not a weakly prime, because it can be changed into another prime (347563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173780 + 173781.

It is an arithmetic number, because the mean of its divisors is an integer number (173781).

2³⁴⁷⁵⁶¹ is an apocalyptic number.

It is an amenable number.

347561 is a deficient number, since it is larger than the sum of its proper divisors (1).

347561 is an equidigital number, since it uses as much as digits as its factorization.

347561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 347561 is about 589.5430433819. The cubic root of 347561 is about 70.3089069110.

The spelling of 347561 in words is "three hundred forty-seven thousand, five hundred sixty-one".