673736637373 has 2 divisors, whose sum is σ = 673736637374. Its totient is φ = 673736637372.

The previous prime is 673736637349. The next prime is 673736637377. The reversal of 673736637373 is 373736637376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 629956515204 + 43780122169 = 793698^2 + 209237^2 .

It is a cyclic number.

It is not a de Polignac number, because 673736637373 - 2²⁹ = 673199766461 is a prime.

It is a super-2 number, since 2×673736637373² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673736637377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336868318686 + 336868318687.

It is an arithmetic number, because the mean of its divisors is an integer number (336868318687).

Almost surely, 2^673736637373 is an apocalyptic number.

It is an amenable number.

673736637373 is a deficient number, since it is larger than the sum of its proper divisors (1).

673736637373 is an equidigital number, since it uses as much as digits as its factorization.

673736637373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126023688, while the sum is 61.

The spelling of 673736637373 in words is "six hundred seventy-three billion, seven hundred thirty-six million, six hundred thirty-seven thousand, three hundred seventy-three".