343367721 has 8 divisors (see below), whose sum is σ = 508692960. Its totient is φ = 228911796.

The previous prime is 343367711. The next prime is 343367723. The reversal of 343367721 is 127763343.

It is not a de Polignac number, because 343367721 - 2¹³ = 343359529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (343367723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6358635 + ... + 6358688.

It is an arithmetic number, because the mean of its divisors is an integer number (63586620).

Almost surely, 2^343367721 is an apocalyptic number.

It is an amenable number.

343367721 is a deficient number, since it is larger than the sum of its proper divisors (165325239).

343367721 is a wasteful number, since it uses less digits than its factorization.

343367721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12717332 (or 12717326 counting only the distinct ones).

The product of its digits is 63504, while the sum is 36.

The square root of 343367721 is about 18530.1840519731. The cubic root of 343367721 is about 700.2500610002.

The spelling of 343367721 in words is "three hundred forty-three million, three hundred sixty-seven thousand, seven hundred twenty-one".