243369913 has 4 divisors (see below), whose sum is σ = 243458128. Its totient is φ = 243281700.

The previous prime is 243369899. The next prime is 243369961. The reversal of 243369913 is 319963342.

243369913 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243369913 - 2⁵ = 243369881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243369013) 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, 39831 + ... + 45532.

It is an arithmetic number, because the mean of its divisors is an integer number (60864532).

Almost surely, 2^243369913 is an apocalyptic number.

It is an amenable number.

243369913 is a deficient number, since it is larger than the sum of its proper divisors (88215).

243369913 is an equidigital number, since it uses as much as digits as its factorization.

243369913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88214.

The product of its digits is 104976, while the sum is 40.

The square root of 243369913 is about 15600.3177211235. The cubic root of 243369913 is about 624.3416324871.

The spelling of 243369913 in words is "two hundred forty-three million, three hundred sixty-nine thousand, nine hundred thirteen".