73131139 has 6 divisors (see below), whose sum is σ = 75567300. Its totient is φ = 70771140.

The previous prime is 73131073. The next prime is 73131151. The reversal of 73131139 is 93113137.

It is not a de Polignac number, because 73131139 - 2¹³ = 73122947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73131199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37089 + ... + 39010.

It is an arithmetic number, because the mean of its divisors is an integer number (12594550).

Almost surely, 2^73131139 is an apocalyptic number.

73131139 is a deficient number, since it is larger than the sum of its proper divisors (2436161).

73131139 is an equidigital number, since it uses as much as digits as its factorization.

73131139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76161 (or 76130 counting only the distinct ones).

The product of its digits is 1701, while the sum is 28.

The square root of 73131139 is about 8551.6746313222. The cubic root of 73131139 is about 418.1840321946.

The spelling of 73131139 in words is "seventy-three million, one hundred thirty-one thousand, one hundred thirty-nine".