918868819 has 16 divisors (see below), whose sum is σ = 1065972960. Its totient is φ = 782786560.

The previous prime is 918868793. The next prime is 918868877.

918868819 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 918868819 - 2²⁵ = 885314387 is a prime.

It is a super-2 number, since 2×918868819² = 1688639813060909522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918868319) 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, 33027 + ... + 54115.

It is an arithmetic number, because the mean of its divisors is an integer number (66623310).

Almost surely, 2^918868819 is an apocalyptic number.

918868819 is a deficient number, since it is larger than the sum of its proper divisors (147104141).

918868819 is a wasteful number, since it uses less digits than its factorization.

918868819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21350.

The product of its digits is 1990656, while the sum is 58.

The square root of 918868819 is about 30312.8490742787. The cubic root of 918868819 is about 972.1900489675.

The spelling of 918868819 in words is "nine hundred eighteen million, eight hundred sixty-eight thousand, eight hundred nineteen".