423140023 has 4 divisors (see below), whose sum is σ = 423548320. Its totient is φ = 422731728.

The previous prime is 423140009. The next prime is 423140077. The reversal of 423140023 is 320041324.

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 423140023 - 2¹³ = 423131831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423140323) 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, 202590 + ... + 204667.

It is an arithmetic number, because the mean of its divisors is an integer number (105887080).

Almost surely, 2^423140023 is an apocalyptic number.

423140023 is a deficient number, since it is larger than the sum of its proper divisors (408297).

423140023 is a wasteful number, since it uses less digits than its factorization.

423140023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408296.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 423140023 is about 20570.3675951598. The cubic root of 423140023 is about 750.7488952183.

Adding to 423140023 its reverse (320041324), we get a palindrome (743181347).

The spelling of 423140023 in words is "four hundred twenty-three million, one hundred forty thousand, twenty-three".