343407681 has 10 divisors (see below), whose sum is σ = 512991842. Its totient is φ = 228938400.

The previous prime is 343407679. The next prime is 343407697. The reversal of 343407681 is 186704343.

It can be written as a sum of positive squares in only one way, i.e., 330512400 + 12895281 = 18180^2 + 3591^2 .

It is not a de Polignac number, because 343407681 - 2¹ = 343407679 is a prime.

It is a super-2 number, since 2×343407681² = 235857670739595522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343407481) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2119720 + ... + 2119881.

Almost surely, 2^343407681 is an apocalyptic number.

It is an amenable number.

343407681 is a deficient number, since it is larger than the sum of its proper divisors (169584161).

343407681 is an equidigital number, since it uses as much as digits as its factorization.

343407681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239613 (or 4239604 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 343407681 is about 18531.2622613787. The cubic root of 343407681 is about 700.2772242087.

The spelling of 343407681 in words is "three hundred forty-three million, four hundred seven thousand, six hundred eighty-one".