673636 has 6 divisors (see below), whose sum is σ = 1178870. Its totient is φ = 336816.

The previous prime is 673619. The next prime is 673637. The reversal of 673636 is 636376.

It can be written as a sum of positive squares in only one way, i.e., 518400 + 155236 = 720^2 + 394^2 .

It is a junction number, because it is equal to n+sod(n) for n = 673598 and 673607.

It is not an unprimeable number, because it can be changed into a prime (673637) by changing a digit.

673636 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84201 + ... + 84208.

2⁶⁷³⁶³⁶ is an apocalyptic number.

It is an amenable number.

673636 is a deficient number, since it is larger than the sum of its proper divisors (505234).

673636 is a wasteful number, since it uses less digits than its factorization.

673636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168413 (or 168411 counting only the distinct ones).

The product of its digits is 13608, while the sum is 31.

The square root of 673636 is about 820.7533125124. The cubic root of 673636 is about 87.6614054842.

The spelling of 673636 in words is "six hundred seventy-three thousand, six hundred thirty-six".