74566189 has 2 divisors, whose sum is σ = 74566190. Its totient is φ = 74566188.

The previous prime is 74566187. The next prime is 74566201. The reversal of 74566189 is 98166547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54612100 + 19954089 = 7390^2 + 4467^2 .

It is a cyclic number.

It is not a de Polignac number, because 74566189 - 2¹ = 74566187 is a prime.

Together with 74566187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74566183) 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, 37283094 + 37283095.

It is an arithmetic number, because the mean of its divisors is an integer number (37283095).

Almost surely, 2^74566189 is an apocalyptic number.

It is an amenable number.

74566189 is a deficient number, since it is larger than the sum of its proper divisors (1).

74566189 is an equidigital number, since it uses as much as digits as its factorization.

74566189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 74566189 is about 8635.1716253934. The cubic root of 74566189 is about 420.9016702105.

The spelling of 74566189 in words is "seventy-four million, five hundred sixty-six thousand, one hundred eighty-nine".