243405103 has 2 divisors, whose sum is σ = 243405104. Its totient is φ = 243405102.

The previous prime is 243405079. The next prime is 243405109. The reversal of 243405103 is 301504342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243405103 - 2²¹ = 241307951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243405109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121702551 + 121702552.

It is an arithmetic number, because the mean of its divisors is an integer number (121702552).

Almost surely, 2^243405103 is an apocalyptic number.

243405103 is a deficient number, since it is larger than the sum of its proper divisors (1).

243405103 is an equidigital number, since it uses as much as digits as its factorization.

243405103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 243405103 is about 15601.4455420003. The cubic root of 243405103 is about 624.3717232008.

Adding to 243405103 its reverse (301504342), we get a palindrome (544909445).

The spelling of 243405103 in words is "two hundred forty-three million, four hundred five thousand, one hundred three".