423506643 has 8 divisors (see below), whose sum is σ = 645343488. Its totient is φ = 242003784.

The previous prime is 423506639. The next prime is 423506647. The reversal of 423506643 is 346605324.

It is an interprime number because it is at equal distance from previous prime (423506639) and next prime (423506647).

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

It is not a de Polignac number, because 423506643 - 2² = 423506639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423506647) 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, 10083471 + ... + 10083512.

It is an arithmetic number, because the mean of its divisors is an integer number (80667936).

Almost surely, 2^423506643 is an apocalyptic number.

423506643 is a deficient number, since it is larger than the sum of its proper divisors (221836845).

423506643 is a wasteful number, since it uses less digits than its factorization.

423506643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20166993.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 423506643 is about 20579.2770281174. The cubic root of 423506643 is about 750.9656557007.

The spelling of 423506643 in words is "four hundred twenty-three million, five hundred six thousand, six hundred forty-three".