74885509 has 4 divisors (see below), whose sum is σ = 74915500. Its totient is φ = 74855520.

The previous prime is 74885483. The next prime is 74885533. The reversal of 74885509 is 90558847.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48650625 + 26234884 = 6975^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 74885509 - 2⁵ = 74885477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74885549) 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 in 3 ways as a sum of consecutive naturals, for example, 10872 + ... + 16369.

It is an arithmetic number, because the mean of its divisors is an integer number (18728875).

Almost surely, 2^74885509 is an apocalyptic number.

It is an amenable number.

74885509 is a deficient number, since it is larger than the sum of its proper divisors (29991).

74885509 is a wasteful number, since it uses less digits than its factorization.

74885509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29990.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 74885509 is about 8653.6413722779. The cubic root of 74885509 is about 421.5016334771.

The spelling of 74885509 in words is "seventy-four million, eight hundred eighty-five thousand, five hundred nine".