718218899 has 4 divisors (see below), whose sum is σ = 718604640. Its totient is φ = 717833160.

The previous prime is 718218871. The next prime is 718218911. The reversal of 718218899 is 998812817.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 718218899 - 2⁸ = 718218643 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 718218899.

It is not an unprimeable number, because it can be changed into a prime (718211899) 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, 190064 + ... + 193805.

It is an arithmetic number, because the mean of its divisors is an integer number (179651160).

Almost surely, 2^718218899 is an apocalyptic number.

718218899 is a deficient number, since it is larger than the sum of its proper divisors (385741).

718218899 is a wasteful number, since it uses less digits than its factorization.

718218899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385740.

The product of its digits is 580608, while the sum is 53.

The square root of 718218899 is about 26799.6063217354. The cubic root of 718218899 is about 895.5412803089.

The spelling of 718218899 in words is "seven hundred eighteen million, two hundred eighteen thousand, eight hundred ninety-nine".