39139390667 has 8 divisors (see below), whose sum is σ = 42245266224.
Its totient is φ = 36047108448.
The previous prime is 39139390663. The next prime is 39139390687. The reversal of 39139390667 is 76609393193.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 39139390667 - 22 = 39139390663 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (39139390663) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3392348 + ... + 3403865.
It is an arithmetic number, because the mean of its divisors is an integer number (5280658278).
Almost surely, 239139390667 is an apocalyptic number.
39139390667 is a deficient number, since it is larger than the sum of its proper divisors (3105875557).
39139390667 is a wasteful number, since it uses less digits than its factorization.
39139390667 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6796669.
The product of its (nonzero) digits is 4960116, while the sum is 56.
The spelling of 39139390667 in words is "thirty-nine billion, one hundred thirty-nine million, three hundred ninety thousand, six hundred sixty-seven".