421330493 has 8 divisors (see below), whose sum is σ = 426786528. Its totient is φ = 415883664.

The previous prime is 421330457. The next prime is 421330519. The reversal of 421330493 is 394033124.

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 421330493 - 2¹⁴ = 421314109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421335493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171671 + ... + 174107.

It is an arithmetic number, because the mean of its divisors is an integer number (53348316).

Almost surely, 2^421330493 is an apocalyptic number.

It is an amenable number.

421330493 is a deficient number, since it is larger than the sum of its proper divisors (5456035).

421330493 is a wasteful number, since it uses less digits than its factorization.

421330493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 421330493 is about 20526.3365703673. The cubic root of 421330493 is about 749.6771902636.

The spelling of 421330493 in words is "four hundred twenty-one million, three hundred thirty thousand, four hundred ninety-three".