73609189 has 4 divisors (see below), whose sum is σ = 73632780. Its totient is φ = 73585600.

The previous prime is 73609187. The next prime is 73609199. The reversal of 73609189 is 98190637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98190637 = 37 ⋅2653801.

It can be written as a sum of positive squares in 2 ways, for example, as 52678564 + 20930625 = 7258^2 + 4575^2 .

It is a cyclic number.

It is not a de Polignac number, because 73609189 - 2¹ = 73609187 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 (73609181) 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, 6244 + ... + 13645.

It is an arithmetic number, because the mean of its divisors is an integer number (18408195).

Almost surely, 2^73609189 is an apocalyptic number.

It is an amenable number.

73609189 is a deficient number, since it is larger than the sum of its proper divisors (23591).

73609189 is a wasteful number, since it uses less digits than its factorization.

73609189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23590.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 73609189 is about 8579.5797682637. The cubic root of 73609189 is about 419.0932611576.

The spelling of 73609189 in words is "seventy-three million, six hundred nine thousand, one hundred eighty-nine".