605491819 has 4 divisors (see below), whose sum is σ = 606092920. Its totient is φ = 604890720.

The previous prime is 605491781. The next prime is 605491823. The reversal of 605491819 is 918194506.

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 605491819 - 2¹⁵ = 605459051 is a prime.

It is a super-2 number, since 2×605491819² = 733240685751857522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605491849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299037 + ... + 301054.

It is an arithmetic number, because the mean of its divisors is an integer number (151523230).

Almost surely, 2^605491819 is an apocalyptic number.

605491819 is a deficient number, since it is larger than the sum of its proper divisors (601101).

605491819 is a wasteful number, since it uses less digits than its factorization.

605491819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601100.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 605491819 is about 24606.7433643707. The cubic root of 605491819 is about 845.9981757157.

The spelling of 605491819 in words is "six hundred five million, four hundred ninety-one thousand, eight hundred nineteen".