408947923 has 2 divisors, whose sum is σ = 408947924. Its totient is φ = 408947922.

The previous prime is 408947863. The next prime is 408947927. The reversal of 408947923 is 329749804.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408947923 - 2¹⁷ = 408816851 is a prime.

It is not a weakly prime, because it can be changed into another prime (408947927) 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, 204473961 + 204473962.

It is an arithmetic number, because the mean of its divisors is an integer number (204473962).

Almost surely, 2^408947923 is an apocalyptic number.

408947923 is a deficient number, since it is larger than the sum of its proper divisors (1).

408947923 is an equidigital number, since it uses as much as digits as its factorization.

408947923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 408947923 is about 20222.4608542086. The cubic root of 408947923 is about 742.2599059714.

The spelling of 408947923 in words is "four hundred eight million, nine hundred forty-seven thousand, nine hundred twenty-three".