918545819 has 4 divisors (see below), whose sum is σ = 972577944. Its totient is φ = 864513696.

The previous prime is 918545783. The next prime is 918545821.

918545819 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 918545819 - 2²⁴ = 901768603 is a prime.

It is a super-2 number, since 2×918545819² = 1687452843204761522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918545879) 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, 27016037 + ... + 27016070.

It is an arithmetic number, because the mean of its divisors is an integer number (243144486).

Almost surely, 2^918545819 is an apocalyptic number.

918545819 is a deficient number, since it is larger than the sum of its proper divisors (54032125).

918545819 is a wasteful number, since it uses less digits than its factorization.

918545819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54032124.

The product of its digits is 518400, while the sum is 50.

The square root of 918545819 is about 30307.5208322951. The cubic root of 918545819 is about 972.0761211392.

The spelling of 918545819 in words is "nine hundred eighteen million, five hundred forty-five thousand, eight hundred nineteen".