673407073657 has 2 divisors, whose sum is σ = 673407073658. Its totient is φ = 673407073656.

The previous prime is 673407073631. The next prime is 673407073723. The reversal of 673407073657 is 756370704376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499108338576 + 174298735081 = 706476^2 + 417491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673407073657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 673407073598 and 673407073607.

It is not a weakly prime, because it can be changed into another prime (673407043657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336703536828 + 336703536829.

It is an arithmetic number, because the mean of its divisors is an integer number (336703536829).

Almost surely, 2^673407073657 is an apocalyptic number.

It is an amenable number.

673407073657 is a deficient number, since it is larger than the sum of its proper divisors (1).

673407073657 is an equidigital number, since it uses as much as digits as its factorization.

673407073657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15558480, while the sum is 55.

The spelling of 673407073657 in words is "six hundred seventy-three billion, four hundred seven million, seventy-three thousand, six hundred fifty-seven".