673523 has 4 divisors (see below), whose sum is σ = 713160. Its totient is φ = 633888.

The previous prime is 673513. The next prime is 673529. The reversal of 673523 is 325376.

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

It is a cyclic number.

It is not a de Polignac number, because 673523 - 2⁶ = 673459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673492 and 673501.

It is not an unprimeable number, because it can be changed into a prime (673529) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 19793 + ... + 19826.

It is an arithmetic number, because the mean of its divisors is an integer number (178290).

2⁶⁷³⁵²³ is an apocalyptic number.

673523 is a deficient number, since it is larger than the sum of its proper divisors (39637).

673523 is a wasteful number, since it uses less digits than its factorization.

673523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39636.

The product of its digits is 3780, while the sum is 26.

The square root of 673523 is about 820.6844704270. The cubic root of 673523 is about 87.6565035823.

Adding to 673523 its reverse (325376), we get a palindrome (998899).

The spelling of 673523 in words is "six hundred seventy-three thousand, five hundred twenty-three".