918808819 has 4 divisors (see below), whose sum is σ = 920458944. Its totient is φ = 917158696.

The previous prime is 918808801. The next prime is 918808867.

918808819 is nontrivially palindromic in base 10.

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 918808819 - 2⁷ = 918808691 is a prime.

It is a super-2 number, since 2×918808819² = 1688419291744349522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918808019) 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, 824227 + ... + 825340.

It is an arithmetic number, because the mean of its divisors is an integer number (230114736).

Almost surely, 2^918808819 is an apocalyptic number.

918808819 is a deficient number, since it is larger than the sum of its proper divisors (1650125).

918808819 is a wasteful number, since it uses less digits than its factorization.

918808819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650124.

The product of its (nonzero) digits is 331776, while the sum is 52.

The square root of 918808819 is about 30311.8593787976. The cubic root of 918808819 is about 972.1688879228.

The spelling of 918808819 in words is "nine hundred eighteen million, eight hundred eight thousand, eight hundred nineteen".