423140643 has 6 divisors (see below), whose sum is σ = 611203164. Its totient is φ = 282093756.

The previous prime is 423140633. The next prime is 423140647. The reversal of 423140643 is 346041324.

423140643 is a `hidden beast` number, since 4 + 2 + 3 + 14 + 0 + 643 = 666.

It is not a de Polignac number, because 423140643 - 2⁶ = 423140579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423140647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23507805 + ... + 23507822.

It is an arithmetic number, because the mean of its divisors is an integer number (101867194).

Almost surely, 2^423140643 is an apocalyptic number.

423140643 is a deficient number, since it is larger than the sum of its proper divisors (188062521).

423140643 is a wasteful number, since it uses less digits than its factorization.

423140643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47015633 (or 47015630 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 423140643 is about 20570.3826653760. The cubic root of 423140643 is about 750.7492618929.

Adding to 423140643 its reverse (346041324), we get a palindrome (769181967).

The spelling of 423140643 in words is "four hundred twenty-three million, one hundred forty thousand, six hundred forty-three".