423724331 has 4 divisors (see below), whose sum is σ = 442147152. Its totient is φ = 405301512.

The previous prime is 423724319. The next prime is 423724351. The reversal of 423724331 is 133427324.

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

It is a cyclic number.

It is not a de Polignac number, because 423724331 - 2¹⁸ = 423462187 is a prime.

It is a super-3 number, since 3×423724331³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423724294 and 423724303.

It is not an unprimeable number, because it can be changed into a prime (423724351) 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, 9211376 + ... + 9211421.

It is an arithmetic number, because the mean of its divisors is an integer number (110536788).

Almost surely, 2^423724331 is an apocalyptic number.

423724331 is a deficient number, since it is larger than the sum of its proper divisors (18422821).

423724331 is a wasteful number, since it uses less digits than its factorization.

423724331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18422820.

The product of its digits is 12096, while the sum is 29.

The square root of 423724331 is about 20584.5653585399. The cubic root of 423724331 is about 751.0943024116.

The spelling of 423724331 in words is "four hundred twenty-three million, seven hundred twenty-four thousand, three hundred thirty-one".