730331 has 8 divisors (see below), whose sum is σ = 843744. Its totient is φ = 619200.

The previous prime is 730321. The next prime is 730339. The reversal of 730331 is 133037.

730331 = 320² + 321² + ... + 326².

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

It is a cyclic number.

It is not a de Polignac number, because 730331 - 2¹⁸ = 468187 is a prime.

It is a super-2 number, since 2×730331² = 1066766739122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730339) 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, 191 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (105468).

2⁷³⁰³³¹ is an apocalyptic number.

730331 is a deficient number, since it is larger than the sum of its proper divisors (113413).

730331 is a wasteful number, since it uses less digits than its factorization.

730331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 189, while the sum is 17.

The square root of 730331 is about 854.5940556779. The cubic root of 730331 is about 90.0547403613.

Adding to 730331 its reverse (133037), we get a palindrome (863368).

The spelling of 730331 in words is "seven hundred thirty thousand, three hundred thirty-one".