731361 has 4 divisors (see below), whose sum is σ = 975152. Its totient is φ = 487572.

The previous prime is 731359. The next prime is 731363. The reversal of 731361 is 163137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (731359) and next prime (731363).

It is not a de Polignac number, because 731361 - 2¹ = 731359 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 731361.

It is not an unprimeable number, because it can be changed into a prime (731363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121891 + ... + 121896.

It is an arithmetic number, because the mean of its divisors is an integer number (243788).

2⁷³¹³⁶¹ is an apocalyptic number.

It is an amenable number.

731361 is a deficient number, since it is larger than the sum of its proper divisors (243791).

731361 is a wasteful number, since it uses less digits than its factorization.

731361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243790.

The product of its digits is 378, while the sum is 21.

The square root of 731361 is about 855.1964686550. The cubic root of 731361 is about 90.0970557915.

Adding to 731361 its reverse (163137), we get a palindrome (894498).

It can be divided in two parts, 73136 and 1, that added together give a palindrome (73137).

The spelling of 731361 in words is "seven hundred thirty-one thousand, three hundred sixty-one".