673654272307321 has 2 divisors, whose sum is σ = 673654272307322. Its totient is φ = 673654272307320.

The previous prime is 673654272307267. The next prime is 673654272307409. The reversal of 673654272307321 is 123703272456376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561437623355625 + 112216648951696 = 23694675^2 + 10593236^2 .

It is a cyclic number.

It is not a de Polignac number, because 673654272307321 - 2³¹ = 673652124823673 is a prime.

It is not a weakly prime, because it can be changed into another prime (673654276307321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336827136153660 + 336827136153661.

It is an arithmetic number, because the mean of its divisors is an integer number (336827136153661).

Almost surely, 2^{673654272307321} is an apocalyptic number.

It is an amenable number.

673654272307321 is a deficient number, since it is larger than the sum of its proper divisors (1).

673654272307321 is an equidigital number, since it uses as much as digits as its factorization.

673654272307321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53343360, while the sum is 58.

The spelling of 673654272307321 in words is "six hundred seventy-three trillion, six hundred fifty-four billion, two hundred seventy-two million, three hundred seven thousand, three hundred twenty-one".