243331420979 has 2 divisors, whose sum is σ = 243331420980. Its totient is φ = 243331420978.

The previous prime is 243331420957. The next prime is 243331421027. The reversal of 243331420979 is 979024133342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243331420979 - 2²⁴ = 243314643763 is a prime.

It is not a weakly prime, because it can be changed into another prime (243331420679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121665710489 + 121665710490.

It is an arithmetic number, because the mean of its divisors is an integer number (121665710490).

Almost surely, 2^243331420979 is an apocalyptic number.

243331420979 is a deficient number, since it is larger than the sum of its proper divisors (1).

243331420979 is an equidigital number, since it uses as much as digits as its factorization.

243331420979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 47.

The spelling of 243331420979 in words is "two hundred forty-three billion, three hundred thirty-one million, four hundred twenty thousand, nine hundred seventy-nine".