918909819 has 16 divisors (see below), whose sum is σ = 1362673440. Its totient is φ = 612010080.

The previous prime is 918909811. The next prime is 918909821.

918909819 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 918909819 - 2³ = 918909811 is a prime.

It is a super-2 number, since 2×918909819² = 1688790510909225522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (918909811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12609 + ... + 44685.

It is an arithmetic number, because the mean of its divisors is an integer number (85167090).

Almost surely, 2^918909819 is an apocalyptic number.

918909819 is a deficient number, since it is larger than the sum of its proper divisors (443763621).

918909819 is a wasteful number, since it uses less digits than its factorization.

918909819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33147 (or 33141 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 918909819 is about 30313.5253476068. The cubic root of 918909819 is about 972.2045084850.

The spelling of 918909819 in words is "nine hundred eighteen million, nine hundred nine thousand, eight hundred nineteen".