423864321 has 4 divisors (see below), whose sum is σ = 565152432. Its totient is φ = 282576212.

The previous prime is 423864313. The next prime is 423864347. The reversal of 423864321 is 123468324.

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 a cyclic number.

It is not a de Polignac number, because 423864321 - 2³ = 423864313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423860321) 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, 70644051 + ... + 70644056.

It is an arithmetic number, because the mean of its divisors is an integer number (141288108).

Almost surely, 2^423864321 is an apocalyptic number.

It is an amenable number.

423864321 is a deficient number, since it is larger than the sum of its proper divisors (141288111).

423864321 is a wasteful number, since it uses less digits than its factorization.

423864321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141288110.

The product of its digits is 27648, while the sum is 33.

The square root of 423864321 is about 20587.9654410046. The cubic root of 423864321 is about 751.1770087897.

The spelling of 423864321 in words is "four hundred twenty-three million, eight hundred sixty-four thousand, three hundred twenty-one".