210424009 has 2 divisors, whose sum is σ = 210424010. Its totient is φ = 210424008.

The previous prime is 210424003. The next prime is 210424021. The reversal of 210424009 is 900424012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203689984 + 6734025 = 14272^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 210424009 - 2⁹ = 210423497 is a prime.

It is not a weakly prime, because it can be changed into another prime (210424003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105212004 + 105212005.

It is an arithmetic number, because the mean of its divisors is an integer number (105212005).

Almost surely, 2^210424009 is an apocalyptic number.

It is an amenable number.

210424009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210424009 is an equidigital number, since it uses as much as digits as its factorization.

210424009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 210424009 is about 14505.9990693506. Note that the first 3 decimals coincide. The cubic root of 210424009 is about 594.7919702099.

The spelling of 210424009 in words is "two hundred ten million, four hundred twenty-four thousand, nine".