321138471677 has 2 divisors, whose sum is σ = 321138471678. Its totient is φ = 321138471676.

The previous prime is 321138471671. The next prime is 321138471721. The reversal of 321138471677 is 776174831123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194387519236 + 126750952441 = 440894^2 + 356021^2 .

It is a cyclic number.

It is not a de Polignac number, because 321138471677 - 2⁶ = 321138471613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321138471671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160569235838 + 160569235839.

It is an arithmetic number, because the mean of its divisors is an integer number (160569235839).

Almost surely, 2^321138471677 is an apocalyptic number.

It is an amenable number.

321138471677 is a deficient number, since it is larger than the sum of its proper divisors (1).

321138471677 is an equidigital number, since it uses as much as digits as its factorization.

321138471677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 50.

The spelling of 321138471677 in words is "three hundred twenty-one billion, one hundred thirty-eight million, four hundred seventy-one thousand, six hundred seventy-seven".