74309 has 4 divisors (see below), whose sum is σ = 78240. Its totient is φ = 70380.

The previous prime is 74297. The next prime is 74311. The reversal of 74309 is 90347.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90347 = 167 ⋅541.

It is a cyclic number.

It is not a de Polignac number, because 74309 - 2⁴ = 74293 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 74309.

It is not an unprimeable number, because it can be changed into a prime (74209) 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, 1937 + ... + 1974.

It is an arithmetic number, because the mean of its divisors is an integer number (19560).

2⁷⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

74309 is a deficient number, since it is larger than the sum of its proper divisors (3931).

74309 is a wasteful number, since it uses less digits than its factorization.

74309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 74309 is about 272.5967718077. The cubic root of 74309 is about 42.0417196939.

It can be divided in two parts, 74 and 309, that added together give a palindrome (383).

The spelling of 74309 in words is "seventy-four thousand, three hundred nine".