6918493823 has 4 divisors (see below), whose sum is σ = 6921406800. Its totient is φ = 6915580848.

The previous prime is 6918493793. The next prime is 6918493849. The reversal of 6918493823 is 3283948196.

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 6918493823 - 2¹⁶ = 6918428287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6918423823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1452923 + ... + 1457676.

It is an arithmetic number, because the mean of its divisors is an integer number (1730351700).

Almost surely, 2^6918493823 is an apocalyptic number.

6918493823 is a deficient number, since it is larger than the sum of its proper divisors (2912977).

6918493823 is a wasteful number, since it uses less digits than its factorization.

6918493823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912976.

The product of its digits is 2239488, while the sum is 53.

The square root of 6918493823 is about 83177.4838703360. The cubic root of 6918493823 is about 1905.4776208647.

The spelling of 6918493823 in words is "six billion, nine hundred eighteen million, four hundred ninety-three thousand, eight hundred twenty-three".