67445139 has 8 divisors (see below), whose sum is σ = 90154960. Its totient is φ = 44849376.

The previous prime is 67445111. The next prime is 67445149. The reversal of 67445139 is 93154476.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67445139 - 2⁷ = 67445011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67445097 and 67445106.

It is not an unprimeable number, because it can be changed into a prime (67445149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27124 + ... + 29505.

It is an arithmetic number, because the mean of its divisors is an integer number (11269370).

Almost surely, 2^67445139 is an apocalyptic number.

67445139 is a deficient number, since it is larger than the sum of its proper divisors (22709821).

67445139 is a wasteful number, since it uses less digits than its factorization.

67445139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57029.

The product of its digits is 90720, while the sum is 39.

The square root of 67445139 is about 8212.4989497716. The cubic root of 67445139 is about 407.0523046914.

The spelling of 67445139 in words is "sixty-seven million, four hundred forty-five thousand, one hundred thirty-nine".