423932321 has 4 divisors (see below), whose sum is σ = 424094532. Its totient is φ = 423770112.

The previous prime is 423932303. The next prime is 423932363. The reversal of 423932321 is 123239324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 267682321 + 156250000 = 16361^2 + 12500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423932321 is a prime.

It is a super-2 number, since 2×423932321² = 359437225576894082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423932221) 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, 77120 + ... + 82433.

It is an arithmetic number, because the mean of its divisors is an integer number (106023633).

Almost surely, 2^423932321 is an apocalyptic number.

It is an amenable number.

423932321 is a deficient number, since it is larger than the sum of its proper divisors (162211).

423932321 is a wasteful number, since it uses less digits than its factorization.

423932321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162210.

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

The square root of 423932321 is about 20589.6168249922. The cubic root of 423932321 is about 751.2171767576.

The spelling of 423932321 in words is "four hundred twenty-three million, nine hundred thirty-two thousand, three hundred twenty-one".