243346403 has 4 divisors (see below), whose sum is σ = 243499440. Its totient is φ = 243193368.

The previous prime is 243346393. The next prime is 243346421. The reversal of 243346403 is 304643342.

243346403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304643342 = 2 ⋅152321671.

It is a cyclic number.

It is not a de Polignac number, because 243346403 - 2⁶ = 243346339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243346423) 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, 74108 + ... + 77321.

It is an arithmetic number, because the mean of its divisors is an integer number (60874860).

Almost surely, 2^243346403 is an apocalyptic number.

243346403 is a deficient number, since it is larger than the sum of its proper divisors (153037).

243346403 is a wasteful number, since it uses less digits than its factorization.

243346403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153036.

The product of its (nonzero) digits is 20736, while the sum is 29.

The square root of 243346403 is about 15599.5641926305. The cubic root of 243346403 is about 624.3215276403.

Adding to 243346403 its reverse (304643342), we get a palindrome (547989745).

The spelling of 243346403 in words is "two hundred forty-three million, three hundred forty-six thousand, four hundred three".