343687381 has 8 divisors (see below), whose sum is σ = 356193720. Its totient is φ = 331224768.

The previous prime is 343687373. The next prime is 343687387. The reversal of 343687381 is 183786343.

It can be written as a sum of positive squares in 4 ways, for example, as 4796100 + 338891281 = 2190^2 + 18409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343687381 - 2³ = 343687373 is a prime.

It is a super-2 number, since 2×343687381² = 236242031717278322, 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 (343687387) 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, 5515 + ... + 26791.

It is an arithmetic number, because the mean of its divisors is an integer number (44524215).

Almost surely, 2^343687381 is an apocalyptic number.

It is an amenable number.

343687381 is a deficient number, since it is larger than the sum of its proper divisors (12506339).

343687381 is a wasteful number, since it uses less digits than its factorization.

343687381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21863.

The product of its digits is 290304, while the sum is 43.

The square root of 343687381 is about 18538.8074319790. The cubic root of 343687381 is about 700.4672941048.

The spelling of 343687381 in words is "three hundred forty-three million, six hundred eighty-seven thousand, three hundred eighty-one".