73564789 has 4 divisors (see below), whose sum is σ = 77436640. Its totient is φ = 69692940.

The previous prime is 73564781. The next prime is 73564817. The reversal of 73564789 is 98746537.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 73564789 - 2³ = 73564781 is a prime.

It is a super-3 number, since 3×73564789³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73564781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935897 + ... + 1935934.

It is an arithmetic number, because the mean of its divisors is an integer number (19359160).

Almost surely, 2^73564789 is an apocalyptic number.

It is an amenable number.

73564789 is a deficient number, since it is larger than the sum of its proper divisors (3871851).

73564789 is a wasteful number, since it uses less digits than its factorization.

73564789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871850.

The product of its digits is 1270080, while the sum is 49.

The square root of 73564789 is about 8576.9918386343. The cubic root of 73564789 is about 419.0089805417.

The spelling of 73564789 in words is "seventy-three million, five hundred sixty-four thousand, seven hundred eighty-nine".