423001609 has 2 divisors, whose sum is σ = 423001610. Its totient is φ = 423001608.

The previous prime is 423001591. The next prime is 423001637. The reversal of 423001609 is 906100324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217710025 + 205291584 = 14755^2 + 14328^2 .

It is a cyclic number.

It is not a de Polignac number, because 423001609 - 2¹¹ = 422999561 is a prime.

It is a super-2 number, since 2×423001609² = 357860722433177762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423001679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211500804 + 211500805.

It is an arithmetic number, because the mean of its divisors is an integer number (211500805).

Almost surely, 2^423001609 is an apocalyptic number.

It is an amenable number.

423001609 is a deficient number, since it is larger than the sum of its proper divisors (1).

423001609 is an equidigital number, since it uses as much as digits as its factorization.

423001609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 423001609 is about 20567.0029172945. The cubic root of 423001609 is about 750.6670267394.

The spelling of 423001609 in words is "four hundred twenty-three million, one thousand, six hundred nine".