74525609 has 2 divisors, whose sum is σ = 74525610. Its totient is φ = 74525608.

The previous prime is 74525593. The next prime is 74525623. The reversal of 74525609 is 90652547.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51437584 + 23088025 = 7172^2 + 4805^2 .

It is an emirp because it is prime and its reverse (90652547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74525609 - 2⁴ = 74525593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74525669) 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, 37262804 + 37262805.

It is an arithmetic number, because the mean of its divisors is an integer number (37262805).

Almost surely, 2^74525609 is an apocalyptic number.

It is an amenable number.

74525609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74525609 is an equidigital number, since it uses as much as digits as its factorization.

74525609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 74525609 is about 8632.8216128911. The cubic root of 74525609 is about 420.8253027604.

The spelling of 74525609 in words is "seventy-four million, five hundred twenty-five thousand, six hundred nine".