408224891 has 2 divisors, whose sum is σ = 408224892. Its totient is φ = 408224890.

The previous prime is 408224881. The next prime is 408224917. The reversal of 408224891 is 198422804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 408224891 - 2²² = 404030587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (408224801) 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, 204112445 + 204112446.

It is an arithmetic number, because the mean of its divisors is an integer number (204112446).

Almost surely, 2^408224891 is an apocalyptic number.

408224891 is a deficient number, since it is larger than the sum of its proper divisors (1).

408224891 is an equidigital number, since it uses as much as digits as its factorization.

408224891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 408224891 is about 20204.5759915916. The cubic root of 408224891 is about 741.8222021037.

The spelling of 408224891 in words is "four hundred eight million, two hundred twenty-four thousand, eight hundred ninety-one".