343197661 has 2 divisors, whose sum is σ = 343197662. Its totient is φ = 343197660.

The previous prime is 343197643. The next prime is 343197667. The reversal of 343197661 is 166791343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307125625 + 36072036 = 17525^2 + 6006^2 .

It is an emirp because it is prime and its reverse (166791343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343197661 - 2²¹ = 341100509 is a prime.

It is equal to p_18457546 and since 343197661 and 18457546 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343197667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171598830 + 171598831.

It is an arithmetic number, because the mean of its divisors is an integer number (171598831).

Almost surely, 2^343197661 is an apocalyptic number.

It is an amenable number.

343197661 is a deficient number, since it is larger than the sum of its proper divisors (1).

343197661 is an equidigital number, since it uses as much as digits as its factorization.

343197661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 343197661 is about 18525.5947542852. The cubic root of 343197661 is about 700.1344374445.

The spelling of 343197661 in words is "three hundred forty-three million, one hundred ninety-seven thousand, six hundred sixty-one".