424423243991 has 2 divisors, whose sum is σ = 424423243992. Its totient is φ = 424423243990.

The previous prime is 424423243973. The next prime is 424423244057. The reversal of 424423243991 is 199342324424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 424423243991 - 2¹⁸ = 424422981847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424423243901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212211621995 + 212211621996.

It is an arithmetic number, because the mean of its divisors is an integer number (212211621996).

Almost surely, 2^424423243991 is an apocalyptic number.

424423243991 is a deficient number, since it is larger than the sum of its proper divisors (1).

424423243991 is an equidigital number, since it uses as much as digits as its factorization.

424423243991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 47.

The spelling of 424423243991 in words is "four hundred twenty-four billion, four hundred twenty-three million, two hundred forty-three thousand, nine hundred ninety-one".