731169 has 12 divisors (see below), whose sum is σ = 1065636. Its totient is φ = 483072.

The previous prime is 731141. The next prime is 731173. The reversal of 731169 is 961137.

It can be written as a sum of positive squares in 2 ways, for example, as 439569 + 291600 = 663^2 + 540^2 .

It is not a de Polignac number, because 731169 - 2⁷ = 731041 is a prime.

It is a super-2 number, since 2×731169² = 1069216213122, which contains 22 as substring.

It is a Curzon number.

731169 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (731189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 937 + ... + 1529.

It is an arithmetic number, because the mean of its divisors is an integer number (88803).

2⁷³¹¹⁶⁹ is an apocalyptic number.

It is an amenable number.

731169 is a deficient number, since it is larger than the sum of its proper divisors (334467).

731169 is a wasteful number, since it uses less digits than its factorization.

731169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 733 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 731169 is about 855.0842063797. The cubic root of 731169 is about 90.0891708807.

It can be divided in two parts, 731 and 169, that added together give a square (900 = 30²).

The spelling of 731169 in words is "seven hundred thirty-one thousand, one hundred sixty-nine".