408978827 has 2 divisors, whose sum is σ = 408978828. Its totient is φ = 408978826.

The previous prime is 408978803. The next prime is 408978833. The reversal of 408978827 is 728879804.

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-408978827 is a prime.

It is not a weakly prime, because it can be changed into another prime (408978127) 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, 204489413 + 204489414.

It is an arithmetic number, because the mean of its divisors is an integer number (204489414).

Almost surely, 2^408978827 is an apocalyptic number.

408978827 is a deficient number, since it is larger than the sum of its proper divisors (1).

408978827 is an equidigital number, since it uses as much as digits as its factorization.

408978827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The square root of 408978827 is about 20223.2249406468. The cubic root of 408978827 is about 742.2786029097.

The spelling of 408978827 in words is "four hundred eight million, nine hundred seventy-eight thousand, eight hundred twenty-seven".