730705 has 4 divisors (see below), whose sum is σ = 876852. Its totient is φ = 584560.

The previous prime is 730679. The next prime is 730727. The reversal of 730705 is 507037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507037 = 137 ⋅3701.

It can be written as a sum of positive squares in 2 ways, for example, as 501264 + 229441 = 708^2 + 479^2 .

It is not a de Polignac number, because 730705 - 2¹⁵ = 697937 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

730705 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 730705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73066 + ... + 73075.

It is an arithmetic number, because the mean of its divisors is an integer number (219213).

2⁷³⁰⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

730705 is a deficient number, since it is larger than the sum of its proper divisors (146147).

730705 is a wasteful number, since it uses less digits than its factorization.

730705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146146.

The product of its (nonzero) digits is 735, while the sum is 22.

The square root of 730705 is about 854.8128450135. The cubic root of 730705 is about 90.0701099792.

The spelling of 730705 in words is "seven hundred thirty thousand, seven hundred five".