673559973839 has 2 divisors, whose sum is σ = 673559973840. Its totient is φ = 673559973838.

The previous prime is 673559973761. The next prime is 673559973851. The reversal of 673559973839 is 938379955376.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673559973839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673559973859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336779986919 + 336779986920.

It is an arithmetic number, because the mean of its divisors is an integer number (336779986920).

Almost surely, 2^673559973839 is an apocalyptic number.

673559973839 is a deficient number, since it is larger than the sum of its proper divisors (1).

673559973839 is an equidigital number, since it uses as much as digits as its factorization.

673559973839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1157360400, while the sum is 74.

The spelling of 673559973839 in words is "six hundred seventy-three billion, five hundred fifty-nine million, nine hundred seventy-three thousand, eight hundred thirty-nine".