673018639 has 2 divisors, whose sum is σ = 673018640. Its totient is φ = 673018638.

The previous prime is 673018603. The next prime is 673018667. The reversal of 673018639 is 936810376.

673018639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673018639 - 2²⁹ = 136147727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 673018595 and 673018604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673018669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336509319 + 336509320.

It is an arithmetic number, because the mean of its divisors is an integer number (336509320).

Almost surely, 2^673018639 is an apocalyptic number.

673018639 is a deficient number, since it is larger than the sum of its proper divisors (1).

673018639 is an equidigital number, since it uses as much as digits as its factorization.

673018639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 673018639 is about 25942.6027799834. The cubic root of 673018639 is about 876.3461788482.

It can be divided in two parts, 6 and 73018639, that multiplied together give a palindrome (438111834).

The spelling of 673018639 in words is "six hundred seventy-three million, eighteen thousand, six hundred thirty-nine".