67145239 has 6 divisors (see below), whose sum is σ = 78107784. Its totient is φ = 57553020.

The previous prime is 67145233. The next prime is 67145357. The reversal of 67145239 is 93254176.

It is not a de Polignac number, because 67145239 - 2¹⁵ = 67112471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67145198 and 67145207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67145233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 685107 + ... + 685204.

It is an arithmetic number, because the mean of its divisors is an integer number (13017964).

Almost surely, 2^67145239 is an apocalyptic number.

67145239 is a deficient number, since it is larger than the sum of its proper divisors (10962545).

67145239 is a wasteful number, since it uses less digits than its factorization.

67145239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370325 (or 1370318 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 67145239 is about 8194.2198530428. The cubic root of 67145239 is about 406.4480784274.

The spelling of 67145239 in words is "sixty-seven million, one hundred forty-five thousand, two hundred thirty-nine".