423648081 has 6 divisors (see below), whose sum is σ = 611936130. Its totient is φ = 282432048.

The previous prime is 423648047. The next prime is 423648101. The reversal of 423648081 is 180846324.

423648081 is a `hidden beast` number, since 4 + 2 + 3 + 648 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 368294481 + 55353600 = 19191^2 + 7440^2 .

It is not a de Polignac number, because 423648081 - 2⁹ = 423647569 is a prime.

It is a super-2 number, since 2×423648081² = 358955393069965122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423648031) 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, 23535996 + ... + 23536013.

It is an arithmetic number, because the mean of its divisors is an integer number (101989355).

Almost surely, 2^423648081 is an apocalyptic number.

It is an amenable number.

423648081 is a deficient number, since it is larger than the sum of its proper divisors (188288049).

423648081 is a wasteful number, since it uses less digits than its factorization.

423648081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47072015 (or 47072012 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 423648081 is about 20582.7131593481. The cubic root of 423648081 is about 751.0492460923.

The spelling of 423648081 in words is "four hundred twenty-three million, six hundred forty-eight thousand, eighty-one".