423533665 has 16 divisors (see below), whose sum is σ = 541129680. Its totient is φ = 317122560.

The previous prime is 423533659. The next prime is 423533689. The reversal of 423533665 is 566335324.

It can be written as a sum of positive squares in 8 ways, for example, as 47018449 + 376515216 = 6857^2 + 19404^2 .

It is not a de Polignac number, because 423533665 - 2⁵ = 423533633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1621 + ... + 29149.

It is an arithmetic number, because the mean of its divisors is an integer number (33820605).

Almost surely, 2^423533665 is an apocalyptic number.

It is an amenable number.

423533665 is a deficient number, since it is larger than the sum of its proper divisors (117596015).

423533665 is a wasteful number, since it uses less digits than its factorization.

423533665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27732.

The product of its digits is 194400, while the sum is 37.

The square root of 423533665 is about 20579.9335518850. The cubic root of 423533665 is about 750.9816272427.

Adding to 423533665 its reverse (566335324), we get a palindrome (989868989).

The spelling of 423533665 in words is "four hundred twenty-three million, five hundred thirty-three thousand, six hundred sixty-five".