243929473 has 2 divisors, whose sum is σ = 243929474. Its totient is φ = 243929472.

The previous prime is 243929461. The next prime is 243929507. The reversal of 243929473 is 374929342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223562304 + 20367169 = 14952^2 + 4513^2 .

It is a cyclic number.

It is not a de Polignac number, because 243929473 - 2²¹ = 241832321 is a prime.

It is not a weakly prime, because it can be changed into another prime (243929453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121964736 + 121964737.

It is an arithmetic number, because the mean of its divisors is an integer number (121964737).

Almost surely, 2^243929473 is an apocalyptic number.

It is an amenable number.

243929473 is a deficient number, since it is larger than the sum of its proper divisors (1).

243929473 is an equidigital number, since it uses as much as digits as its factorization.

243929473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 243929473 is about 15618.2416744011. The cubic root of 243929473 is about 624.8197649895.

The spelling of 243929473 in words is "two hundred forty-three million, nine hundred twenty-nine thousand, four hundred seventy-three".