409960289 has 2 divisors, whose sum is σ = 409960290. Its totient is φ = 409960288.

The previous prime is 409960267. The next prime is 409960297. The reversal of 409960289 is 982069904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352200289 + 57760000 = 18767^2 + 7600^2 .

It is a cyclic number.

It is not a de Polignac number, because 409960289 - 2¹² = 409956193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (409960249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204980144 + 204980145.

It is an arithmetic number, because the mean of its divisors is an integer number (204980145).

Almost surely, 2^409960289 is an apocalyptic number.

It is an amenable number.

409960289 is a deficient number, since it is larger than the sum of its proper divisors (1).

409960289 is an equidigital number, since it uses as much as digits as its factorization.

409960289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 409960289 is about 20247.4761143210. The cubic root of 409960289 is about 742.8718987049.

The spelling of 409960289 in words is "four hundred nine million, nine hundred sixty thousand, two hundred eighty-nine".