423706643 has 4 divisors (see below), whose sum is σ = 424117848. Its totient is φ = 423295440.

The previous prime is 423706639. The next prime is 423706663. The reversal of 423706643 is 346607324.

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 423706643 - 2² = 423706639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423706663) 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, 204053 + ... + 206118.

It is an arithmetic number, because the mean of its divisors is an integer number (106029462).

Almost surely, 2^423706643 is an apocalyptic number.

423706643 is a deficient number, since it is larger than the sum of its proper divisors (411205).

423706643 is a wasteful number, since it uses less digits than its factorization.

423706643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411204.

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 423706643 is about 20584.1357117563. The cubic root of 423706643 is about 751.0838510089.

The spelling of 423706643 in words is "four hundred twenty-three million, seven hundred six thousand, six hundred forty-three".