139517692321 has 8 divisors (see below), whose sum is σ = 159455779200. Its totient is φ = 119581352448.

The previous prime is 139517692271. The next prime is 139517692357. The reversal of 139517692321 is 123296715931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 139517692321 - 2³³ = 130927757729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139517692621) 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, 260896 + ... + 589153.

It is an arithmetic number, because the mean of its divisors is an integer number (19931972400).

Almost surely, 2^139517692321 is an apocalyptic number.

It is an amenable number.

139517692321 is a deficient number, since it is larger than the sum of its proper divisors (19938086879).

139517692321 is an equidigital number, since it uses as much as digits as its factorization.

139517692321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873503.

The product of its digits is 612360, while the sum is 49.

The spelling of 139517692321 in words is "one hundred thirty-nine billion, five hundred seventeen million, six hundred ninety-two thousand, three hundred twenty-one".