73830509 has 4 divisors (see below), whose sum is σ = 73875420. Its totient is φ = 73785600.

The previous prime is 73830481. The next prime is 73830511. The reversal of 73830509 is 90503837.

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 31866025 + 41964484 = 5645^2 + 6478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73830509 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 (73830539) 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, 19892 + ... + 23309.

It is an arithmetic number, because the mean of its divisors is an integer number (18468855).

Almost surely, 2^73830509 is an apocalyptic number.

It is an amenable number.

73830509 is a deficient number, since it is larger than the sum of its proper divisors (44911).

73830509 is a wasteful number, since it uses less digits than its factorization.

73830509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44910.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 73830509 is about 8592.4681553090. The cubic root of 73830509 is about 419.5128687103.

The spelling of 73830509 in words is "seventy-three million, eight hundred thirty thousand, five hundred nine".