343564981 has 4 divisors (see below), whose sum is σ = 343917612. Its totient is φ = 343212352.

The previous prime is 343564919. The next prime is 343564997. The reversal of 343564981 is 189465343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 337640625 + 5924356 = 18375^2 + 2434^2 .

It is a cyclic number.

It is not a de Polignac number, because 343564981 - 2⁹ = 343564469 is a prime.

It is a super-2 number, since 2×343564981² = 236073792339060722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343564181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174850 + ... + 176803.

It is an arithmetic number, because the mean of its divisors is an integer number (85979403).

Almost surely, 2^343564981 is an apocalyptic number.

It is an amenable number.

343564981 is a deficient number, since it is larger than the sum of its proper divisors (352631).

343564981 is an equidigital number, since it uses as much as digits as its factorization.

343564981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352630.

The product of its digits is 311040, while the sum is 43.

The square root of 343564981 is about 18535.5059547885. The cubic root of 343564981 is about 700.3841299837.

The spelling of 343564981 in words is "three hundred forty-three million, five hundred sixty-four thousand, nine hundred eighty-one".