73380509 has 4 divisors (see below), whose sum is σ = 75363804. Its totient is φ = 71397216.

The previous prime is 73380497. The next prime is 73380521. The reversal of 73380509 is 90508337.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (73380497) and next prime (73380521).

It can be written as a sum of positive squares in 2 ways, for example, as 31416025 + 41964484 = 5605^2 + 6478^2 .

It is a cyclic number.

It is not a de Polignac number, because 73380509 - 2¹⁶ = 73314973 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 (73380539) 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, 991592 + ... + 991665.

It is an arithmetic number, because the mean of its divisors is an integer number (18840951).

Almost surely, 2^73380509 is an apocalyptic number.

It is an amenable number.

73380509 is a deficient number, since it is larger than the sum of its proper divisors (1983295).

73380509 is a wasteful number, since it uses less digits than its factorization.

73380509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983294.

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

The square root of 73380509 is about 8566.2424084309. The cubic root of 73380509 is about 418.6588151050.

The spelling of 73380509 in words is "seventy-three million, three hundred eighty thousand, five hundred nine".