408378871 has 2 divisors, whose sum is σ = 408378872. Its totient is φ = 408378870.

The previous prime is 408378857. The next prime is 408378877. The reversal of 408378871 is 178873804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408378871 - 2¹⁹ = 407854583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408378877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204189435 + 204189436.

It is an arithmetic number, because the mean of its divisors is an integer number (204189436).

Almost surely, 2^408378871 is an apocalyptic number.

408378871 is a deficient number, since it is larger than the sum of its proper divisors (1).

408378871 is an equidigital number, since it uses as much as digits as its factorization.

408378871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 408378871 is about 20208.3861552574. The cubic root of 408378871 is about 741.9154606861.

The spelling of 408378871 in words is "four hundred eight million, three hundred seventy-eight thousand, eight hundred seventy-one".