718243493 has 8 divisors (see below), whose sum is σ = 810557280. Its totient is φ = 630432880.

The previous prime is 718243469. The next prime is 718243507. The reversal of 718243493 is 394342817.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 718243493 - 2¹⁴ = 718227109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 718243493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718243093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125455 + ... + 1126092.

It is an arithmetic number, because the mean of its divisors is an integer number (101319660).

Almost surely, 2^718243493 is an apocalyptic number.

It is an amenable number.

718243493 is a deficient number, since it is larger than the sum of its proper divisors (92313787).

718243493 is a wasteful number, since it uses less digits than its factorization.

718243493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251587.

The product of its digits is 145152, while the sum is 41.

The square root of 718243493 is about 26800.0651678312. The cubic root of 718243493 is about 895.5515022115.

The spelling of 718243493 in words is "seven hundred eighteen million, two hundred forty-three thousand, four hundred ninety-three".