718320073 has 4 divisors (see below), whose sum is σ = 728160148. Its totient is φ = 708480000.

The previous prime is 718320049. The next prime is 718320089. The reversal of 718320073 is 370023817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 518154169 + 200165904 = 22763^2 + 14148^2 .

It is a cyclic number.

It is not a de Polignac number, because 718320073 - 2²⁹ = 181449161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718320173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4919928 + ... + 4920073.

It is an arithmetic number, because the mean of its divisors is an integer number (182040037).

Almost surely, 2^718320073 is an apocalyptic number.

718320073 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

718320073 is a deficient number, since it is larger than the sum of its proper divisors (9840075).

718320073 is an equidigital number, since it uses as much as digits as its factorization.

718320073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9840074.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 718320073 is about 26801.4938576192. The cubic root of 718320073 is about 895.5833293460.

The spelling of 718320073 in words is "seven hundred eighteen million, three hundred twenty thousand, seventy-three".