723198813 has 16 divisors (see below), whose sum is σ = 982679040. Its totient is φ = 472960304.

The previous prime is 723198799. The next prime is 723198851. The reversal of 723198813 is 318891327.

It is a cyclic number.

It is not a de Polignac number, because 723198813 - 2⁴ = 723198797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723198863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84970 + ... + 93092.

It is an arithmetic number, because the mean of its divisors is an integer number (61417440).

Almost surely, 2^723198813 is an apocalyptic number.

It is an amenable number.

723198813 is a deficient number, since it is larger than the sum of its proper divisors (259480227).

723198813 is a wasteful number, since it uses less digits than its factorization.

723198813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8688.

The product of its digits is 72576, while the sum is 42.

The square root of 723198813 is about 26892.3560328953. The cubic root of 723198813 is about 897.6063195509.

The spelling of 723198813 in words is "seven hundred twenty-three million, one hundred ninety-eight thousand, eight hundred thirteen".