408419009 has 2 divisors, whose sum is σ = 408419010. Its totient is φ = 408419008.

The previous prime is 408418963. The next prime is 408419029. The reversal of 408419009 is 900914804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357966400 + 50452609 = 18920^2 + 7103^2 .

It is a cyclic number.

It is not a de Polignac number, because 408419009 - 2²⁴ = 391641793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408419009.

It is not a weakly prime, because it can be changed into another prime (408419029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204209504 + 204209505.

It is an arithmetic number, because the mean of its divisors is an integer number (204209505).

Almost surely, 2^408419009 is an apocalyptic number.

It is an amenable number.

408419009 is a deficient number, since it is larger than the sum of its proper divisors (1).

408419009 is an equidigital number, since it uses as much as digits as its factorization.

408419009 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 35.

The square root of 408419009 is about 20209.3792334154. The cubic root of 408419009 is about 741.9397665692.

The spelling of 408419009 in words is "four hundred eight million, four hundred nineteen thousand, nine".