730399 has 2 divisors, whose sum is σ = 730400. Its totient is φ = 730398.

The previous prime is 730397. The next prime is 730421. The reversal of 730399 is 993037.

It is a weak prime.

It is an emirp because it is prime and its reverse (993037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 730399 - 2¹ = 730397 is a prime.

Together with 730397, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 730399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (730397) 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 as a sum of consecutive naturals, namely, 365199 + 365200.

It is an arithmetic number, because the mean of its divisors is an integer number (365200).

2⁷³⁰³⁹⁹ is an apocalyptic number.

730399 is a deficient number, since it is larger than the sum of its proper divisors (1).

730399 is an equidigital number, since it uses as much as digits as its factorization.

730399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 730399 is about 854.6338397232. The cubic root of 730399 is about 90.0575352275.

The spelling of 730399 in words is "seven hundred thirty thousand, three hundred ninety-nine".