74309189 has 2 divisors, whose sum is σ = 74309190. Its totient is φ = 74309188.

The previous prime is 74309173. The next prime is 74309219. The reversal of 74309189 is 98190347.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66552964 + 7756225 = 8158^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 74309189 - 2⁴ = 74309173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74309119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37154594 + 37154595.

It is an arithmetic number, because the mean of its divisors is an integer number (37154595).

Almost surely, 2^74309189 is an apocalyptic number.

It is an amenable number.

74309189 is a deficient number, since it is larger than the sum of its proper divisors (1).

74309189 is an equidigital number, since it uses as much as digits as its factorization.

74309189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 74309189 is about 8620.2777797470. The cubic root of 74309189 is about 420.4175533733.

The spelling of 74309189 in words is "seventy-four million, three hundred nine thousand, one hundred eighty-nine".