73409581 has 8 divisors (see below), whose sum is σ = 86603264. Its totient is φ = 60892560.

The previous prime is 73409573. The next prime is 73409617. The reversal of 73409581 is 18590437.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73409581 - 2³ = 73409573 is a prime.

It is a super-2 number, since 2×73409581² = 10777933165191122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73409581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73409561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168930 + ... + 169363.

It is an arithmetic number, because the mean of its divisors is an integer number (10825408).

Almost surely, 2^73409581 is an apocalyptic number.

It is an amenable number.

73409581 is a deficient number, since it is larger than the sum of its proper divisors (13193683).

73409581 is a wasteful number, since it uses less digits than its factorization.

73409581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338331.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 73409581 is about 8567.9391337707. The cubic root of 73409581 is about 418.7140960974.

The spelling of 73409581 in words is "seventy-three million, four hundred nine thousand, five hundred eighty-one".