673720339 has 2 divisors, whose sum is σ = 673720340. Its totient is φ = 673720338.

The previous prime is 673720321. The next prime is 673720367. The reversal of 673720339 is 933027376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 673720339 - 2¹⁵ = 673687571 is a prime.

It is not a weakly prime, because it can be changed into another prime (673720739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336860169 + 336860170.

It is an arithmetic number, because the mean of its divisors is an integer number (336860170).

Almost surely, 2^673720339 is an apocalyptic number.

673720339 is a deficient number, since it is larger than the sum of its proper divisors (1).

673720339 is an equidigital number, since it uses as much as digits as its factorization.

673720339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 40.

The square root of 673720339 is about 25956.1233430572. The cubic root of 673720339 is about 876.6506372436.

The spelling of 673720339 in words is "six hundred seventy-three million, seven hundred twenty thousand, three hundred thirty-nine".