673327021 has 2 divisors, whose sum is σ = 673327022. Its totient is φ = 673327020.

The previous prime is 673327003. The next prime is 673327027. The reversal of 673327021 is 120723376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612018121 + 61308900 = 24739^2 + 7830^2 .

It is a cyclic number.

It is not a de Polignac number, because 673327021 - 2⁹ = 673326509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673327027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336663510 + 336663511.

It is an arithmetic number, because the mean of its divisors is an integer number (336663511).

Almost surely, 2^673327021 is an apocalyptic number.

It is an amenable number.

673327021 is a deficient number, since it is larger than the sum of its proper divisors (1).

673327021 is an equidigital number, since it uses as much as digits as its factorization.

673327021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 673327021 is about 25948.5456432533. The cubic root of 673327021 is about 876.4800077922.

The spelling of 673327021 in words is "six hundred seventy-three million, three hundred twenty-seven thousand, twenty-one".