408247663 has 2 divisors, whose sum is σ = 408247664. Its totient is φ = 408247662.

The previous prime is 408247621. The next prime is 408247669. The reversal of 408247663 is 366742804.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408247663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408247669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204123831 + 204123832.

It is an arithmetic number, because the mean of its divisors is an integer number (204123832).

Almost surely, 2^408247663 is an apocalyptic number.

408247663 is a deficient number, since it is larger than the sum of its proper divisors (1).

408247663 is an equidigital number, since it uses as much as digits as its factorization.

408247663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 408247663 is about 20205.1395194391. The cubic root of 408247663 is about 741.8359955310.

The spelling of 408247663 in words is "four hundred eight million, two hundred forty-seven thousand, six hundred sixty-three".