73255139 has 4 divisors (see below), whose sum is σ = 75618240. Its totient is φ = 70892040.

The previous prime is 73255129. The next prime is 73255177. The reversal of 73255139 is 93155237.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93155237 = 7 ⋅13307891.

It is not a de Polignac number, because 73255139 - 2⁴ = 73255123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73255099 and 73255108.

It is not an unprimeable number, because it can be changed into a prime (73255109) 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, 1181504 + ... + 1181565.

It is an arithmetic number, because the mean of its divisors is an integer number (18904560).

Almost surely, 2^73255139 is an apocalyptic number.

73255139 is a deficient number, since it is larger than the sum of its proper divisors (2363101).

73255139 is a wasteful number, since it uses less digits than its factorization.

73255139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363100.

The product of its digits is 28350, while the sum is 35.

The square root of 73255139 is about 8558.9216026320. The cubic root of 73255139 is about 418.4202541387.

The spelling of 73255139 in words is "seventy-three million, two hundred fifty-five thousand, one hundred thirty-nine".