718813 has 2 divisors, whose sum is σ = 718814. Its totient is φ = 718812.

The previous prime is 718807. The next prime is 718841. The reversal of 718813 is 318817.

It is a happy number.

It is an a-pointer prime, because the next prime (718841) can be obtained adding 718813 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362404 + 356409 = 602^2 + 597^2 .

It is an emirp because it is prime and its reverse (318817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 718813 - 2¹³ = 710621 is a prime.

718813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (718513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359406 + 359407.

It is an arithmetic number, because the mean of its divisors is an integer number (359407).

2⁷¹⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

718813 is a deficient number, since it is larger than the sum of its proper divisors (1).

718813 is an equidigital number, since it uses as much as digits as its factorization.

718813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 718813 is about 847.8284024495. The cubic root of 718813 is about 89.5788138817.

The spelling of 718813 in words is "seven hundred eighteen thousand, eight hundred thirteen".