343485661 has 2 divisors, whose sum is σ = 343485662. Its totient is φ = 343485660.

The previous prime is 343485643. The next prime is 343485679. The reversal of 343485661 is 166584343.

It is a balanced prime because it is at equal distance from previous prime (343485643) and next prime (343485679).

It can be written as a sum of positive squares in only one way, i.e., 276556900 + 66928761 = 16630^2 + 8181^2 .

It is a cyclic number.

It is not a de Polignac number, because 343485661 - 2¹⁷ = 343354589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343485641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171742830 + 171742831.

It is an arithmetic number, because the mean of its divisors is an integer number (171742831).

Almost surely, 2^343485661 is an apocalyptic number.

It is an amenable number.

343485661 is a deficient number, since it is larger than the sum of its proper divisors (1).

343485661 is an equidigital number, since it uses as much as digits as its factorization.

343485661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 343485661 is about 18533.3661540477. The cubic root of 343485661 is about 700.3302258237.

The spelling of 343485661 in words is "three hundred forty-three million, four hundred eighty-five thousand, six hundred sixty-one".