42749533 has 2 divisors, whose sum is σ = 42749534. Its totient is φ = 42749532.

The previous prime is 42749513. The next prime is 42749537. The reversal of 42749533 is 33594724.

42749533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29192409 + 13557124 = 5403^2 + 3682^2 .

It is a cyclic number.

It is not a de Polignac number, because 42749533 - 2⁵ = 42749501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42749492 and 42749501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42749537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21374766 + 21374767.

It is an arithmetic number, because the mean of its divisors is an integer number (21374767).

Almost surely, 2^42749533 is an apocalyptic number.

It is an amenable number.

42749533 is a deficient number, since it is larger than the sum of its proper divisors (1).

42749533 is an equidigital number, since it uses as much as digits as its factorization.

42749533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 42749533 is about 6538.3127028309. The cubic root of 42749533 is about 349.6582596302.

The spelling of 42749533 in words is "forty-two million, seven hundred forty-nine thousand, five hundred thirty-three".