423512639 has 24 divisors (see below), whose sum is σ = 490081872. Its totient is φ = 362862720.

The previous prime is 423512623. The next prime is 423512689. The reversal of 423512639 is 936215324.

It is not a de Polignac number, because 423512639 - 2⁴ = 423512623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423512599 and 423512608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423512689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 424289 + ... + 425285.

It is an arithmetic number, because the mean of its divisors is an integer number (20420078).

Almost surely, 2^423512639 is an apocalyptic number.

423512639 is a deficient number, since it is larger than the sum of its proper divisors (66569233).

423512639 is a wasteful number, since it uses less digits than its factorization.

423512639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127 (or 1104 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 423512639 is about 20579.4227081325. The cubic root of 423512639 is about 750.9691997371.

The spelling of 423512639 in words is "four hundred twenty-three million, five hundred twelve thousand, six hundred thirty-nine".