321743864677 has 2 divisors, whose sum is σ = 321743864678. Its totient is φ = 321743864676.

The previous prime is 321743864669. The next prime is 321743864693. The reversal of 321743864677 is 776468347123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178083156001 + 143660708676 = 421999^2 + 379026^2 .

It is a cyclic number.

It is not a de Polignac number, because 321743864677 - 2³ = 321743864669 is a prime.

It is a super-2 number, since 2×321743864677² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321743864657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160871932338 + 160871932339.

It is an arithmetic number, because the mean of its divisors is an integer number (160871932339).

Almost surely, 2^321743864677 is an apocalyptic number.

It is an amenable number.

321743864677 is a deficient number, since it is larger than the sum of its proper divisors (1).

321743864677 is an equidigital number, since it uses as much as digits as its factorization.

321743864677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28449792, while the sum is 58.

The spelling of 321743864677 in words is "three hundred twenty-one billion, seven hundred forty-three million, eight hundred sixty-four thousand, six hundred seventy-seven".