243434403 has 40 divisors (see below), whose sum is σ = 384721920. Its totient is φ = 152973360.

The previous prime is 243434377. The next prime is 243434447. The reversal of 243434403 is 304434342.

It is not a de Polignac number, because 243434403 - 2⁵ = 243434371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (243434473) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 564598 + ... + 565028.

It is an arithmetic number, because the mean of its divisors is an integer number (9618048).

Almost surely, 2^243434403 is an apocalyptic number.

243434403 is a deficient number, since it is larger than the sum of its proper divisors (141287517).

243434403 is a wasteful number, since it uses less digits than its factorization.

243434403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

The square root of 243434403 is about 15602.3845292955. The cubic root of 243434403 is about 624.3967752057.

Adding to 243434403 its reverse (304434342), we get a palindrome (547868745).

The spelling of 243434403 in words is "two hundred forty-three million, four hundred thirty-four thousand, four hundred three".