73385561 has 4 divisors (see below), whose sum is σ = 73487232. Its totient is φ = 73283892.

The previous prime is 73385551. The next prime is 73385591. The reversal of 73385561 is 16558337.

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 73385561 - 2⁶ = 73385497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73385551) 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, 49745 + ... + 51198.

It is an arithmetic number, because the mean of its divisors is an integer number (18371808).

Almost surely, 2^73385561 is an apocalyptic number.

It is an amenable number.

73385561 is a deficient number, since it is larger than the sum of its proper divisors (101671).

73385561 is a wasteful number, since it uses less digits than its factorization.

73385561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101670.

The product of its digits is 75600, while the sum is 38.

The square root of 73385561 is about 8566.5372817726. The cubic root of 73385561 is about 418.6684226326.

The spelling of 73385561 in words is "seventy-three million, three hundred eighty-five thousand, five hundred sixty-one".