730320161 has 8 divisors (see below), whose sum is σ = 746753280. Its totient is φ = 714066912.

The previous prime is 730320089. The next prime is 730320181. The reversal of 730320161 is 161023037.

It is a happy number.

730320161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-730320161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730320181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36740 + ... + 53013.

It is an arithmetic number, because the mean of its divisors is an integer number (93344160).

Almost surely, 2^730320161 is an apocalyptic number.

It is an amenable number.

730320161 is a deficient number, since it is larger than the sum of its proper divisors (16433119).

730320161 is a wasteful number, since it uses less digits than its factorization.

730320161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89935.

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

The square root of 730320161 is about 27024.4363678505. The cubic root of 730320161 is about 900.5429485179.

Adding to 730320161 its reverse (161023037), we get a palindrome (891343198).

The spelling of 730320161 in words is "seven hundred thirty million, three hundred twenty thousand, one hundred sixty-one".