408008389 has 2 divisors, whose sum is σ = 408008390. Its totient is φ = 408008388.

The previous prime is 408008383. The next prime is 408008407. The reversal of 408008389 is 983800804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365001025 + 43007364 = 19105^2 + 6558^2 .

It is a cyclic number.

It is not a de Polignac number, because 408008389 - 2¹⁵ = 407975621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408008383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204004194 + 204004195.

It is an arithmetic number, because the mean of its divisors is an integer number (204004195).

Almost surely, 2^408008389 is an apocalyptic number.

It is an amenable number.

408008389 is a deficient number, since it is larger than the sum of its proper divisors (1).

408008389 is an equidigital number, since it uses as much as digits as its factorization.

408008389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 408008389 is about 20199.2175343502. The cubic root of 408008389 is about 741.6910371546.

The spelling of 408008389 in words is "four hundred eight million, eight thousand, three hundred eighty-nine".