42739573 has 2 divisors, whose sum is σ = 42739574. Its totient is φ = 42739572.

The previous prime is 42739561. The next prime is 42739577. The reversal of 42739573 is 37593724.

42739573 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., 38651089 + 4088484 = 6217^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 42739573 - 2⁹ = 42739061 is a prime.

It is a super-2 number, since 2×42739573² = 3653342200444658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42739577) 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, 21369786 + 21369787.

It is an arithmetic number, because the mean of its divisors is an integer number (21369787).

Almost surely, 2^42739573 is an apocalyptic number.

It is an amenable number.

42739573 is a deficient number, since it is larger than the sum of its proper divisors (1).

42739573 is an equidigital number, since it uses as much as digits as its factorization.

42739573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 40.

The square root of 42739573 is about 6537.5509940650. The cubic root of 42739573 is about 349.6311024777.

It can be divided in two parts, 427 and 39573, that added together give a square (40000 = 200²).

The spelling of 42739573 in words is "forty-two million, seven hundred thirty-nine thousand, five hundred seventy-three".