408808392389 has 2 divisors, whose sum is σ = 408808392390. Its totient is φ = 408808392388.

The previous prime is 408808392331. The next prime is 408808392403. The reversal of 408808392389 is 983293808804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216008364289 + 192800028100 = 464767^2 + 439090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408808392389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408808392989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204404196194 + 204404196195.

It is an arithmetic number, because the mean of its divisors is an integer number (204404196195).

Almost surely, 2^408808392389 is an apocalyptic number.

It is an amenable number.

408808392389 is a deficient number, since it is larger than the sum of its proper divisors (1).

408808392389 is an equidigital number, since it uses as much as digits as its factorization.

408808392389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23887872, while the sum is 62.

The spelling of 408808392389 in words is "four hundred eight billion, eight hundred eight million, three hundred ninety-two thousand, three hundred eighty-nine".