423152209 has 4 divisors (see below), whose sum is σ = 425847604. Its totient is φ = 420456816.

The previous prime is 423152161. The next prime is 423152221. The reversal of 423152209 is 902251324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 289680400 + 133471809 = 17020^2 + 11553^2 .

It is a cyclic number.

It is not a de Polignac number, because 423152209 - 2⁹ = 423151697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423152269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347462 + ... + 1347775.

It is an arithmetic number, because the mean of its divisors is an integer number (106461901).

Almost surely, 2^423152209 is an apocalyptic number.

It is an amenable number.

423152209 is a deficient number, since it is larger than the sum of its proper divisors (2695395).

423152209 is a wasteful number, since it uses less digits than its factorization.

423152209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695394.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 423152209 is about 20570.6637958040. The cubic root of 423152209 is about 750.7561020826.

The spelling of 423152209 in words is "four hundred twenty-three million, one hundred fifty-two thousand, two hundred nine".