73056139 has 4 divisors (see below), whose sum is σ = 78675856. Its totient is φ = 67436424.

The previous prime is 73056131. The next prime is 73056143. The reversal of 73056139 is 93165037.

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

It is a cyclic number.

It is not a de Polignac number, because 73056139 - 2³ = 73056131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73056131) 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, 2809839 + ... + 2809864.

It is an arithmetic number, because the mean of its divisors is an integer number (19668964).

Almost surely, 2^73056139 is an apocalyptic number.

73056139 is a deficient number, since it is larger than the sum of its proper divisors (5619717).

73056139 is a wasteful number, since it uses less digits than its factorization.

73056139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619716.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 73056139 is about 8547.2884004227. The cubic root of 73056139 is about 418.0410263983.

The spelling of 73056139 in words is "seventy-three million, fifty-six thousand, one hundred thirty-nine".