673739 has 8 divisors (see below), whose sum is σ = 767232. Its totient is φ = 585640.

The previous prime is 673669. The next prime is 673747. The reversal of 673739 is 937376.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-673739 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673699 and 673708.

It is not an unprimeable number, because it can be changed into a prime (673769) 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 7 ways as a sum of consecutive naturals, for example, 1079 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (95904).

2⁶⁷³⁷³⁹ is an apocalyptic number.

673739 is a deficient number, since it is larger than the sum of its proper divisors (93493).

673739 is a wasteful number, since it uses less digits than its factorization.

673739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697.

The product of its digits is 23814, while the sum is 35.

The square root of 673739 is about 820.8160573478. The cubic root of 673739 is about 87.6658731120.

It can be divided in two parts, 6737 and 39, that added together give a palindrome (6776).

The spelling of 673739 in words is "six hundred seventy-three thousand, seven hundred thirty-nine".