321017709139 has 4 divisors (see below), whose sum is σ = 326458687320. Its totient is φ = 315576730960.

The previous prime is 321017709127. The next prime is 321017709193. The reversal of 321017709139 is 931907710123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321017709139 - 2⁷ = 321017709011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321017709095 and 321017709104.

It is not an unprimeable number, because it can be changed into a prime (321017799139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2720489002 + ... + 2720489119.

It is an arithmetic number, because the mean of its divisors is an integer number (81614671830).

Almost surely, 2^321017709139 is an apocalyptic number.

321017709139 is a deficient number, since it is larger than the sum of its proper divisors (5440978181).

321017709139 is an equidigital number, since it uses as much as digits as its factorization.

321017709139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440978180.

The product of its (nonzero) digits is 71442, while the sum is 43.

The spelling of 321017709139 in words is "three hundred twenty-one billion, seventeen million, seven hundred nine thousand, one hundred thirty-nine".