408081671 has 2 divisors, whose sum is σ = 408081672. Its totient is φ = 408081670.

The previous prime is 408081631. The next prime is 408081673. The reversal of 408081671 is 176180804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408081671 is a prime.

Together with 408081673, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_21744098 and since 408081671 and 21744098 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408081673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204040835 + 204040836.

It is an arithmetic number, because the mean of its divisors is an integer number (204040836).

Almost surely, 2^408081671 is an apocalyptic number.

408081671 is a deficient number, since it is larger than the sum of its proper divisors (1).

408081671 is an equidigital number, since it uses as much as digits as its factorization.

408081671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 408081671 is about 20201.0314340630. The cubic root of 408081671 is about 741.7354393044.

The spelling of 408081671 in words is "four hundred eight million, eighty-one thousand, six hundred seventy-one".