343768681 has 3 divisors (see below), whose sum is σ = 343787223. Its totient is φ = 343750140.

The previous prime is 343768673. The next prime is 343768693. The reversal of 343768681 is 186867343.

The square root of 343768681 is 18541.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 186867343 = 13 ⋅14374411.

It can be written as a sum of positive squares in only one way, i.e., 161518681 + 182250000 = 12709^2 + 13500^2 .

It is not a de Polignac number, because 343768681 - 2³ = 343768673 is a prime.

It is a super-2 number, since 2×343768681² = 236353812072959522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343768631) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9271 + ... + 27811.

It is an arithmetic number, because the mean of its divisors is an integer number (114595741).

Almost surely, 2^343768681 is an apocalyptic number.

343768681 is the 18541-st square number.

343768681 is the 9271-st centered octagonal number.

It is an amenable number.

343768681 is a deficient number, since it is larger than the sum of its proper divisors (18542).

343768681 is an frugal number, since it uses more digits than its factorization.

343768681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37082 (or 18541 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The cubic root of 343768681 is about 700.5225221059.

The spelling of 343768681 in words is "three hundred forty-three million, seven hundred sixty-eight thousand, six hundred eighty-one".