718513 has 2 divisors, whose sum is σ = 718514. Its totient is φ = 718512.

The previous prime is 718511. The next prime is 718541. The reversal of 718513 is 315817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552049 + 166464 = 743^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 718513 - 2¹ = 718511 is a prime.

Together with 718511, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (718511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359256 + 359257.

It is an arithmetic number, because the mean of its divisors is an integer number (359257).

2⁷¹⁸⁵¹³ is an apocalyptic number.

It is an amenable number.

718513 is a deficient number, since it is larger than the sum of its proper divisors (1).

718513 is an equidigital number, since it uses as much as digits as its factorization.

718513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 718513 is about 847.6514613920. The cubic root of 718513 is about 89.5663501006.

The spelling of 718513 in words is "seven hundred eighteen thousand, five hundred thirteen".