424323209 has 2 divisors, whose sum is σ = 424323210. Its totient is φ = 424323208.

The previous prime is 424323199. The next prime is 424323241. The reversal of 424323209 is 902323424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339591184 + 84732025 = 18428^2 + 9205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424323209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (424323709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212161604 + 212161605.

It is an arithmetic number, because the mean of its divisors is an integer number (212161605).

Almost surely, 2^424323209 is an apocalyptic number.

It is an amenable number.

424323209 is a deficient number, since it is larger than the sum of its proper divisors (1).

424323209 is an equidigital number, since it uses as much as digits as its factorization.

424323209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 424323209 is about 20599.1069952073. The cubic root of 424323209 is about 751.4479931406.

The spelling of 424323209 in words is "four hundred twenty-four million, three hundred twenty-three thousand, two hundred nine".