408488400809 has 2 divisors, whose sum is σ = 408488400810. Its totient is φ = 408488400808.

The previous prime is 408488400737. The next prime is 408488400811. The reversal of 408488400809 is 908004884804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295153158400 + 113335242409 = 543280^2 + 336653^2 .

It is a cyclic number.

It is not a de Polignac number, because 408488400809 - 2¹² = 408488396713 is a prime.

Together with 408488400811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (408488409809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204244200404 + 204244200405.

It is an arithmetic number, because the mean of its divisors is an integer number (204244200405).

Almost surely, 2^408488400809 is an apocalyptic number.

It is an amenable number.

408488400809 is a deficient number, since it is larger than the sum of its proper divisors (1).

408488400809 is an equidigital number, since it uses as much as digits as its factorization.

408488400809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2359296, while the sum is 53.

The spelling of 408488400809 in words is "four hundred eight billion, four hundred eighty-eight million, four hundred thousand, eight hundred nine".