42043633 has 2 divisors, whose sum is σ = 42043634. Its totient is φ = 42043632.

The previous prime is 42043627. The next prime is 42043643. The reversal of 42043633 is 33634024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34492129 + 7551504 = 5873^2 + 2748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42043633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42043598 and 42043607.

It is not a weakly prime, because it can be changed into another prime (42043643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021816 + 21021817.

It is an arithmetic number, because the mean of its divisors is an integer number (21021817).

Almost surely, 2^42043633 is an apocalyptic number.

It is an amenable number.

42043633 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043633 is an equidigital number, since it uses as much as digits as its factorization.

42043633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 42043633 is about 6484.1061835846. The cubic root of 42043633 is about 347.7229954241.

Adding to 42043633 its reverse (33634024), we get a palindrome (75677657).

The spelling of 42043633 in words is "forty-two million, forty-three thousand, six hundred thirty-three".