74836609 has 2 divisors, whose sum is σ = 74836610. Its totient is φ = 74836608.

The previous prime is 74836589. The next prime is 74836633. The reversal of 74836609 is 90663847.

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., 70308225 + 4528384 = 8385^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 74836609 - 2⁵ = 74836577 is a prime.

It is not a weakly prime, because it can be changed into another prime (74836639) 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, 37418304 + 37418305.

It is an arithmetic number, because the mean of its divisors is an integer number (37418305).

Almost surely, 2^74836609 is an apocalyptic number.

It is an amenable number.

74836609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74836609 is an equidigital number, since it uses as much as digits as its factorization.

74836609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 74836609 is about 8650.8155106903. The cubic root of 74836609 is about 421.4098670896.

The spelling of 74836609 in words is "seventy-four million, eight hundred thirty-six thousand, six hundred nine".