74809 has 4 divisors (see below), whose sum is σ = 85504. Its totient is φ = 64116.

The previous prime is 74797. The next prime is 74821. The reversal of 74809 is 90847.

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 an interprime number because it is at equal distance from previous prime (74797) and next prime (74821).

It is a cyclic number.

It is not a de Polignac number, because 74809 - 2⁹ = 74297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5337 + ... + 5350.

It is an arithmetic number, because the mean of its divisors is an integer number (21376).

2⁷⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

74809 is a deficient number, since it is larger than the sum of its proper divisors (10695).

74809 is a wasteful number, since it uses less digits than its factorization.

74809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10694.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 74809 is about 273.5123397582. The cubic root of 74809 is about 42.1358038017.

The spelling of 74809 in words is "seventy-four thousand, eight hundred nine".