408946871 has 2 divisors, whose sum is σ = 408946872. Its totient is φ = 408946870.

The previous prime is 408946793. The next prime is 408946891. The reversal of 408946871 is 178649804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408946871 is a prime.

It is a super-3 number, since 3×408946871³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408946891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204473435 + 204473436.

It is an arithmetic number, because the mean of its divisors is an integer number (204473436).

Almost surely, 2^408946871 is an apocalyptic number.

408946871 is a deficient number, since it is larger than the sum of its proper divisors (1).

408946871 is an equidigital number, since it uses as much as digits as its factorization.

408946871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 408946871 is about 20222.4348435098. The cubic root of 408946871 is about 742.2592694942.

The spelling of 408946871 in words is "four hundred eight million, nine hundred forty-six thousand, eight hundred seventy-one".