243344309387 has 2 divisors, whose sum is σ = 243344309388. Its totient is φ = 243344309386.

The previous prime is 243344309357. The next prime is 243344309447. The reversal of 243344309387 is 783903443342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243344309387 - 2⁶ = 243344309323 is a prime.

It is a super-2 number, since 2×243344309387² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243344309317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121672154693 + 121672154694.

It is an arithmetic number, because the mean of its divisors is an integer number (121672154694).

Almost surely, 2^243344309387 is an apocalyptic number.

243344309387 is a deficient number, since it is larger than the sum of its proper divisors (1).

243344309387 is an equidigital number, since it uses as much as digits as its factorization.

243344309387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 50.

The spelling of 243344309387 in words is "two hundred forty-three billion, three hundred forty-four million, three hundred nine thousand, three hundred eighty-seven".