673557 has 16 divisors (see below), whose sum is σ = 974592. Its totient is φ = 412160.

The previous prime is 673553. The next prime is 673567. The reversal of 673557 is 755376.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 673557 - 2² = 673553 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

673557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2257 + ... + 2537.

It is an arithmetic number, because the mean of its divisors is an integer number (60912).

2⁶⁷³⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

673557 is a deficient number, since it is larger than the sum of its proper divisors (301035).

673557 is a wasteful number, since it uses less digits than its factorization.

673557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its digits is 22050, while the sum is 33.

The square root of 673557 is about 820.7051845821. The cubic root of 673557 is about 87.6579785485.

The spelling of 673557 in words is "six hundred seventy-three thousand, five hundred fifty-seven".