493854821 has 16 divisors (see below), whose sum is σ = 527030400. Its totient is φ = 461438208.

The previous prime is 493854817. The next prime is 493854853. The reversal of 493854821 is 128458394.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 493854821 - 2² = 493854817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493854421) 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, 800105 + ... + 800721.

It is an arithmetic number, because the mean of its divisors is an integer number (32939400).

Almost surely, 2^493854821 is an apocalyptic number.

It is an amenable number.

493854821 is a deficient number, since it is larger than the sum of its proper divisors (33175579).

493854821 is a wasteful number, since it uses less digits than its factorization.

493854821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 276480, while the sum is 44.

The square root of 493854821 is about 22222.8445748963. The cubic root of 493854821 is about 790.4354918760.

The spelling of 493854821 in words is "four hundred ninety-three million, eight hundred fifty-four thousand, eight hundred twenty-one".