423413209 has 2 divisors, whose sum is σ = 423413210. Its totient is φ = 423413208.

The previous prime is 423413197. The next prime is 423413281. The reversal of 423413209 is 902314324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317837584 + 105575625 = 17828^2 + 10275^2 .

It is a cyclic number.

It is not a de Polignac number, because 423413209 - 2¹⁷ = 423282137 is a prime.

It is equal to p_22516426 and since 423413209 and 22516426 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (423413009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211706604 + 211706605.

It is an arithmetic number, because the mean of its divisors is an integer number (211706605).

Almost surely, 2^423413209 is an apocalyptic number.

It is an amenable number.

423413209 is a deficient number, since it is larger than the sum of its proper divisors (1).

423413209 is an equidigital number, since it uses as much as digits as its factorization.

423413209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 423413209 is about 20577.0068037118. The cubic root of 423413209 is about 750.9104256456.

It can be divided in two parts, 42 and 3413209, that multiplied together give a triangular number (143354778 = T₁₆₉₃₂).

The spelling of 423413209 in words is "four hundred twenty-three million, four hundred thirteen thousand, two hundred nine".