720394099 has 2 divisors, whose sum is σ = 720394100. Its totient is φ = 720394098.

The previous prime is 720394069. The next prime is 720394111. The reversal of 720394099 is 990493027.

It is a strong prime.

It is an emirp because it is prime and its reverse (990493027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720394099 - 2⁹ = 720393587 is a prime.

It is not a weakly prime, because it can be changed into another prime (720394019) 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 as a sum of consecutive naturals, namely, 360197049 + 360197050.

It is an arithmetic number, because the mean of its divisors is an integer number (360197050).

Almost surely, 2^720394099 is an apocalyptic number.

720394099 is a deficient number, since it is larger than the sum of its proper divisors (1).

720394099 is an equidigital number, since it uses as much as digits as its factorization.

720394099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 720394099 is about 26840.1583266567. The cubic root of 720394099 is about 896.4444488479. Note that the first 5 decimals are identical.

The spelling of 720394099 in words is "seven hundred twenty million, three hundred ninety-four thousand, ninety-nine".