311734521673 has 2 divisors, whose sum is σ = 311734521674. Its totient is φ = 311734521672.

The previous prime is 311734521661. The next prime is 311734521701. The reversal of 311734521673 is 376125437113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201572265024 + 110162256649 = 448968^2 + 331907^2 .

It is a cyclic number.

It is not a de Polignac number, because 311734521673 - 2²⁹ = 311197650761 is a prime.

It is not a weakly prime, because it can be changed into another prime (311734521613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155867260836 + 155867260837.

It is an arithmetic number, because the mean of its divisors is an integer number (155867260837).

Almost surely, 2^311734521673 is an apocalyptic number.

It is an amenable number.

311734521673 is a deficient number, since it is larger than the sum of its proper divisors (1).

311734521673 is an equidigital number, since it uses as much as digits as its factorization.

311734521673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 43.

Adding to 311734521673 its reverse (376125437113), we get a palindrome (687859958786).

The spelling of 311734521673 in words is "three hundred eleven billion, seven hundred thirty-four million, five hundred twenty-one thousand, six hundred seventy-three".