243120311407 has 2 divisors, whose sum is σ = 243120311408. Its totient is φ = 243120311406.

The previous prime is 243120311393. The next prime is 243120311431. The reversal of 243120311407 is 704113021342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120311407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243120311437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560155703 + 121560155704.

It is an arithmetic number, because the mean of its divisors is an integer number (121560155704).

Almost surely, 2^243120311407 is an apocalyptic number.

243120311407 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120311407 is an equidigital number, since it uses as much as digits as its factorization.

243120311407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 243120311407 its reverse (704113021342), we get a palindrome (947233332749).

The spelling of 243120311407 in words is "two hundred forty-three billion, one hundred twenty million, three hundred eleven thousand, four hundred seven".