673658 has 4 divisors (see below), whose sum is σ = 1010490. Its totient is φ = 336828.

The previous prime is 673649. The next prime is 673667. The reversal of 673658 is 856376.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (673649) and next prime (673667).

It can be written as a sum of positive squares in only one way, i.e., 619369 + 54289 = 787^2 + 233^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168413 + ... + 168416.

2⁶⁷³⁶⁵⁸ is an apocalyptic number.

673658 is a deficient number, since it is larger than the sum of its proper divisors (336832).

673658 is a wasteful number, since it uses less digits than its factorization.

673658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336831.

The product of its digits is 30240, while the sum is 35.

The square root of 673658 is about 820.7667147247. The cubic root of 673658 is about 87.6623597731.

It can be divided in two parts, 673 and 658, that added together give a palindrome (1331).

The spelling of 673658 in words is "six hundred seventy-three thousand, six hundred fifty-eight".