493174821 has 4 divisors (see below), whose sum is σ = 657566432. Its totient is φ = 328783212.

The previous prime is 493174793. The next prime is 493174831. The reversal of 493174821 is 128471394.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 493174821 - 2⁵ = 493174789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 493174821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493174831) 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, 82195801 + ... + 82195806.

It is an arithmetic number, because the mean of its divisors is an integer number (164391608).

Almost surely, 2^493174821 is an apocalyptic number.

It is an amenable number.

493174821 is a deficient number, since it is larger than the sum of its proper divisors (164391611).

493174821 is a wasteful number, since it uses less digits than its factorization.

493174821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164391610.

The product of its digits is 48384, while the sum is 39.

The square root of 493174821 is about 22207.5397331627. The cubic root of 493174821 is about 790.0725356674.

The spelling of 493174821 in words is "four hundred ninety-three million, one hundred seventy-four thousand, eight hundred twenty-one".