42909533 has 2 divisors, whose sum is σ = 42909534. Its totient is φ = 42909532.

The previous prime is 42909527. The next prime is 42909553. The reversal of 42909533 is 33590924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42471289 + 438244 = 6517^2 + 662^2 .

It is a cyclic number.

It is not a de Polignac number, because 42909533 - 2⁶ = 42909469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42909493 and 42909502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42909523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21454766 + 21454767.

It is an arithmetic number, because the mean of its divisors is an integer number (21454767).

Almost surely, 2^42909533 is an apocalyptic number.

It is an amenable number.

42909533 is a deficient number, since it is larger than the sum of its proper divisors (1).

42909533 is an equidigital number, since it uses as much as digits as its factorization.

42909533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 42909533 is about 6550.5368482285. The cubic root of 42909533 is about 350.0939421300.

The spelling of 42909533 in words is "forty-two million, nine hundred nine thousand, five hundred thirty-three".