343540403 has 8 divisors (see below), whose sum is σ = 368132688. Its totient is φ = 319435264.

The previous prime is 343540399. The next prime is 343540433. The reversal of 343540403 is 304045343.

It is a happy number.

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 343540403 - 2² = 343540399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (343540433) 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, 120326 + ... + 123147.

It is an arithmetic number, because the mean of its divisors is an integer number (46016586).

Almost surely, 2^343540403 is an apocalyptic number.

343540403 is a deficient number, since it is larger than the sum of its proper divisors (24592285).

343540403 is a wasteful number, since it uses less digits than its factorization.

343540403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243573.

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 343540403 is about 18534.8429451129. The cubic root of 343540403 is about 700.3674281926.

Adding to 343540403 its reverse (304045343), we get a palindrome (647585746).

The spelling of 343540403 in words is "three hundred forty-three million, five hundred forty thousand, four hundred three".