74550809 has 4 divisors (see below), whose sum is σ = 75051300. Its totient is φ = 74050320.

The previous prime is 74550787. The next prime is 74550811. The reversal of 74550809 is 90805547.

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 20675209 + 53875600 = 4547^2 + 7340^2 .

It is a cyclic number.

It is not a de Polignac number, because 74550809 - 2¹² = 74546713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74550829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250022 + ... + 250319.

It is an arithmetic number, because the mean of its divisors is an integer number (18762825).

Almost surely, 2^74550809 is an apocalyptic number.

It is an amenable number.

74550809 is a deficient number, since it is larger than the sum of its proper divisors (500491).

74550809 is a wasteful number, since it uses less digits than its factorization.

74550809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500490.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 74550809 is about 8634.2810355003. The cubic root of 74550809 is about 420.8727298695.

The spelling of 74550809 in words is "seventy-four million, five hundred fifty thousand, eight hundred nine".