42208189 has 2 divisors, whose sum is σ = 42208190. Its totient is φ = 42208188.

The previous prime is 42208181. The next prime is 42208207. The reversal of 42208189 is 98180224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29888089 + 12320100 = 5467^2 + 3510^2 .

It is a cyclic number.

It is not a de Polignac number, because 42208189 - 2³ = 42208181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42208181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21104094 + 21104095.

It is an arithmetic number, because the mean of its divisors is an integer number (21104095).

Almost surely, 2^42208189 is an apocalyptic number.

It is an amenable number.

42208189 is a deficient number, since it is larger than the sum of its proper divisors (1).

42208189 is an equidigital number, since it uses as much as digits as its factorization.

42208189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 42208189 is about 6496.7829731337. The cubic root of 42208189 is about 348.1760597878.

The spelling of 42208189 in words is "forty-two million, two hundred eight thousand, one hundred eighty-nine".