673648457 has 2 divisors, whose sum is σ = 673648458. Its totient is φ = 673648456.

The previous prime is 673648447. The next prime is 673648471. The reversal of 673648457 is 754846376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635997961 + 37650496 = 25219^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 673648457 - 2⁸ = 673648201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673648427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336824228 + 336824229.

It is an arithmetic number, because the mean of its divisors is an integer number (336824229).

Almost surely, 2^673648457 is an apocalyptic number.

It is an amenable number.

673648457 is a deficient number, since it is larger than the sum of its proper divisors (1).

673648457 is an equidigital number, since it uses as much as digits as its factorization.

673648457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 50.

The square root of 673648457 is about 25954.7386232264. The cubic root of 673648457 is about 876.6194583114.

The spelling of 673648457 in words is "six hundred seventy-three million, six hundred forty-eight thousand, four hundred fifty-seven".