74020809 has 4 divisors (see below), whose sum is σ = 98694416. Its totient is φ = 49347204.

The previous prime is 74020787. The next prime is 74020819. The reversal of 74020809 is 90802047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 74020809 - 2¹⁷ = 73889737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74020819) 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, 12336799 + ... + 12336804.

It is an arithmetic number, because the mean of its divisors is an integer number (24673604).

Almost surely, 2^74020809 is an apocalyptic number.

It is an amenable number.

74020809 is a deficient number, since it is larger than the sum of its proper divisors (24673607).

74020809 is a wasteful number, since it uses less digits than its factorization.

74020809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24673606.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 74020809 is about 8603.5346805833. The cubic root of 74020809 is about 419.8729944780.

The spelling of 74020809 in words is "seventy-four million, twenty thousand, eight hundred nine".