42634439 has 2 divisors, whose sum is σ = 42634440. Its totient is φ = 42634438.

The previous prime is 42634391. The next prime is 42634441. The reversal of 42634439 is 93443624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42634439 - 2⁸ = 42634183 is a prime.

Together with 42634441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42634399 and 42634408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42634469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21317219 + 21317220.

It is an arithmetic number, because the mean of its divisors is an integer number (21317220).

Almost surely, 2^42634439 is an apocalyptic number.

42634439 is a deficient number, since it is larger than the sum of its proper divisors (1).

42634439 is an equidigital number, since it uses as much as digits as its factorization.

42634439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 35.

The square root of 42634439 is about 6529.5052645664. The cubic root of 42634439 is about 349.3441841713.

The spelling of 42634439 in words is "forty-two million, six hundred thirty-four thousand, four hundred thirty-nine".