673637 has 2 divisors, whose sum is σ = 673638. Its totient is φ = 673636.

The previous prime is 673619. The next prime is 673639. The reversal of 673637 is 736376.

It is a happy number.

673637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474721 + 198916 = 689^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 673637 - 2⁶ = 673573 is a prime.

Together with 673639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 673637.

It is not a weakly prime, because it can be changed into another prime (673639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336818 + 336819.

It is an arithmetic number, because the mean of its divisors is an integer number (336819).

2⁶⁷³⁶³⁷ is an apocalyptic number.

It is an amenable number.

673637 is a deficient number, since it is larger than the sum of its proper divisors (1).

673637 is an equidigital number, since it uses as much as digits as its factorization.

673637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 32.

The square root of 673637 is about 820.7539217086. The cubic root of 673637 is about 87.6614488614.

The spelling of 673637 in words is "six hundred seventy-three thousand, six hundred thirty-seven".