493789421 has 8 divisors (see below), whose sum is σ = 516172800. Its totient is φ = 471809520.

The previous prime is 493789411. The next prime is 493789459. The reversal of 493789421 is 124987394.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 493789421 - 2⁶ = 493789357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493789411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98366 + ... + 103263.

It is an arithmetic number, because the mean of its divisors is an integer number (64521600).

Almost surely, 2^493789421 is an apocalyptic number.

It is an amenable number.

493789421 is a deficient number, since it is larger than the sum of its proper divisors (22383379).

493789421 is a wasteful number, since it uses less digits than its factorization.

493789421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201739.

The product of its digits is 435456, while the sum is 47.

The square root of 493789421 is about 22221.3730673872. The cubic root of 493789421 is about 790.4005985152.

The spelling of 493789421 in words is "four hundred ninety-three million, seven hundred eighty-nine thousand, four hundred twenty-one".