42208973 has 2 divisors, whose sum is σ = 42208974. Its totient is φ = 42208972.

The previous prime is 42208963. The next prime is 42208993. The reversal of 42208973 is 37980224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41822089 + 386884 = 6467^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 42208973 - 2¹⁸ = 41946829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42208963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21104486 + 21104487.

It is an arithmetic number, because the mean of its divisors is an integer number (21104487).

Almost surely, 2^42208973 is an apocalyptic number.

It is an amenable number.

42208973 is a deficient number, since it is larger than the sum of its proper divisors (1).

42208973 is an equidigital number, since it uses as much as digits as its factorization.

42208973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 42208973 is about 6496.8433104085. The cubic root of 42208973 is about 348.1782155175.

The spelling of 42208973 in words is "forty-two million, two hundred eight thousand, nine hundred seventy-three".