424742839 has 2 divisors, whose sum is σ = 424742840. Its totient is φ = 424742838.

The previous prime is 424742837. The next prime is 424742849. The reversal of 424742839 is 938247424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 424742839 - 2¹ = 424742837 is a prime.

Together with 424742837, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 424742795 and 424742804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424742831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212371419 + 212371420.

It is an arithmetic number, because the mean of its divisors is an integer number (212371420).

Almost surely, 2^424742839 is an apocalyptic number.

424742839 is a deficient number, since it is larger than the sum of its proper divisors (1).

424742839 is an equidigital number, since it uses as much as digits as its factorization.

424742839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 43.

The square root of 424742839 is about 20609.2901139268. The cubic root of 424742839 is about 751.6956237393.

The spelling of 424742839 in words is "four hundred twenty-four million, seven hundred forty-two thousand, eight hundred thirty-nine".