320003131391 has 2 divisors, whose sum is σ = 320003131392. Its totient is φ = 320003131390.

The previous prime is 320003131363. The next prime is 320003131417. The reversal of 320003131391 is 193131300023.

It is an a-pointer prime, because the next prime (320003131417) can be obtained adding 320003131391 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320003131391 - 2¹⁴ = 320003115007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320003131391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320003131321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160001565695 + 160001565696.

It is an arithmetic number, because the mean of its divisors is an integer number (160001565696).

Almost surely, 2^320003131391 is an apocalyptic number.

320003131391 is a deficient number, since it is larger than the sum of its proper divisors (1).

320003131391 is an equidigital number, since it uses as much as digits as its factorization.

320003131391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 26.

The spelling of 320003131391 in words is "three hundred twenty billion, three million, one hundred thirty-one thousand, three hundred ninety-one".