340402303 has 4 divisors (see below), whose sum is σ = 340444048. Its totient is φ = 340360560.

The previous prime is 340402273. The next prime is 340402327. The reversal of 340402303 is 303204043.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 340402303 - 2⁹ = 340401791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340402333) 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 3 ways as a sum of consecutive naturals, for example, 4203 + ... + 26428.

It is an arithmetic number, because the mean of its divisors is an integer number (85111012).

Almost surely, 2^340402303 is an apocalyptic number.

340402303 is a deficient number, since it is larger than the sum of its proper divisors (41745).

340402303 is a wasteful number, since it uses less digits than its factorization.

340402303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41744.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 340402303 is about 18449.9946612458. The cubic root of 340402303 is about 698.2283791945.

Adding to 340402303 its reverse (303204043), we get a palindrome (643606346).

The spelling of 340402303 in words is "three hundred forty million, four hundred two thousand, three hundred three".