718109813 has 2 divisors, whose sum is σ = 718109814. Its totient is φ = 718109812.

The previous prime is 718109797. The next prime is 718109839. The reversal of 718109813 is 318901817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561784804 + 156325009 = 23702^2 + 12503^2 .

It is a cyclic number.

It is not a de Polignac number, because 718109813 - 2⁴ = 718109797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (718109863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359054906 + 359054907.

It is an arithmetic number, because the mean of its divisors is an integer number (359054907).

Almost surely, 2^718109813 is an apocalyptic number.

It is an amenable number.

718109813 is a deficient number, since it is larger than the sum of its proper divisors (1).

718109813 is an equidigital number, since it uses as much as digits as its factorization.

718109813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 718109813 is about 26797.5710279868. The cubic root of 718109813 is about 895.4959385324.

The spelling of 718109813 in words is "seven hundred eighteen million, one hundred nine thousand, eight hundred thirteen".