673426657 has 2 divisors, whose sum is σ = 673426658. Its totient is φ = 673426656.

The previous prime is 673426597. The next prime is 673426673. The reversal of 673426657 is 756624376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487349776 + 186076881 = 22076^2 + 13641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673426657 is a prime.

It is not a weakly prime, because it can be changed into another prime (673426757) 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, 336713328 + 336713329.

It is an arithmetic number, because the mean of its divisors is an integer number (336713329).

Almost surely, 2^673426657 is an apocalyptic number.

It is an amenable number.

673426657 is a deficient number, since it is larger than the sum of its proper divisors (1).

673426657 is an equidigital number, since it uses as much as digits as its factorization.

673426657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 46.

The square root of 673426657 is about 25950.4654486196. The cubic root of 673426657 is about 876.5232382246.

The spelling of 673426657 in words is "six hundred seventy-three million, four hundred twenty-six thousand, six hundred fifty-seven".