42636343 has 2 divisors, whose sum is σ = 42636344. Its totient is φ = 42636342.

The previous prime is 42636337. The next prime is 42636359. The reversal of 42636343 is 34363624.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42636343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42636383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21318171 + 21318172.

It is an arithmetic number, because the mean of its divisors is an integer number (21318172).

Almost surely, 2^42636343 is an apocalyptic number.

42636343 is a deficient number, since it is larger than the sum of its proper divisors (1).

42636343 is an equidigital number, since it uses as much as digits as its factorization.

42636343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 31.

The square root of 42636343 is about 6529.6510626526. The cubic root of 42636343 is about 349.3493845167.

Adding to 42636343 its reverse (34363624), we get a palindrome (76999967).

The spelling of 42636343 in words is "forty-two million, six hundred thirty-six thousand, three hundred forty-three".