730723621 has 8 divisors (see below), whose sum is σ = 736205184. Its totient is φ = 725254560.

The previous prime is 730723577. The next prime is 730723681. The reversal of 730723621 is 126327037.

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 730723621 - 2¹³ = 730715429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730723681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137076 + ... + 142306.

It is an arithmetic number, because the mean of its divisors is an integer number (92025648).

Almost surely, 2^730723621 is an apocalyptic number.

It is an amenable number.

730723621 is a deficient number, since it is larger than the sum of its proper divisors (5481563).

730723621 is a wasteful number, since it uses less digits than its factorization.

730723621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 730723621 is about 27031.9000627037. The cubic root of 730723621 is about 900.7087507652.

The spelling of 730723621 in words is "seven hundred thirty million, seven hundred twenty-three thousand, six hundred twenty-one".