243396474077903 has 2 divisors, whose sum is σ = 243396474077904. Its totient is φ = 243396474077902.

The previous prime is 243396474077777. The next prime is 243396474077909. The reversal of 243396474077903 is 309770474693342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243396474077903 - 2¹² = 243396474073807 is a prime.

It is a super-2 number, since 2×243396474077903² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243396474077909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121698237038951 + 121698237038952.

It is an arithmetic number, because the mean of its divisors is an integer number (121698237038952).

Almost surely, 2^{243396474077903} is an apocalyptic number.

243396474077903 is a deficient number, since it is larger than the sum of its proper divisors (1).

243396474077903 is an equidigital number, since it uses as much as digits as its factorization.

243396474077903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576108288, while the sum is 68.

The spelling of 243396474077903 in words is "two hundred forty-three trillion, three hundred ninety-six billion, four hundred seventy-four million, seventy-seven thousand, nine hundred three".