424322309 has 2 divisors, whose sum is σ = 424322310. Its totient is φ = 424322308.

The previous prime is 424322281. The next prime is 424322321. The reversal of 424322309 is 903223424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333062500 + 91259809 = 18250^2 + 9553^2 .

It is a cyclic number.

It is not a de Polignac number, because 424322309 - 2²⁸ = 155886853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424352309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212161154 + 212161155.

It is an arithmetic number, because the mean of its divisors is an integer number (212161155).

Almost surely, 2^424322309 is an apocalyptic number.

It is an amenable number.

424322309 is a deficient number, since it is larger than the sum of its proper divisors (1).

424322309 is an equidigital number, since it uses as much as digits as its factorization.

424322309 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 424322309 is about 20599.0851495886. The cubic root of 424322309 is about 751.4474618603.

The spelling of 424322309 in words is "four hundred twenty-four million, three hundred twenty-two thousand, three hundred nine".