423993 has 8 divisors (see below), whose sum is σ = 572800. Its totient is φ = 278928.

The previous prime is 423991. The next prime is 424001. The reversal of 423993 is 399324.

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

It is not a de Polignac number, because 423993 - 2¹ = 423991 is a prime.

It is a Duffinian number.

423993 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 423993.

It is not an unprimeable number, because it can be changed into a prime (423991) 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, 658 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (71600).

2⁴²³⁹⁹³ is an apocalyptic number.

It is an amenable number.

423993 is a deficient number, since it is larger than the sum of its proper divisors (148807).

423993 is a wasteful number, since it uses less digits than its factorization.

423993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871.

The product of its digits is 5832, while the sum is 30.

The square root of 423993 is about 651.1474487395. The cubic root of 423993 is about 75.1253016545.

The spelling of 423993 in words is "four hundred twenty-three thousand, nine hundred ninety-three".