731606 has 8 divisors (see below), whose sum is σ = 1112664. Its totient is φ = 360720.

The previous prime is 731603. The next prime is 731611. The reversal of 731606 is 606137.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731603) 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, 2360 + ... + 2651.

It is an arithmetic number, because the mean of its divisors is an integer number (139083).

2⁷³¹⁶⁰⁶ is an apocalyptic number.

731606 is a deficient number, since it is larger than the sum of its proper divisors (381058).

731606 is a wasteful number, since it uses less digits than its factorization.

731606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 731606 is about 855.3396985993. The cubic root of 731606 is about 90.1071152625.

It can be divided in two parts, 7 and 31606, that added together give a palindrome (31613).

The spelling of 731606 in words is "seven hundred thirty-one thousand, six hundred six".