405826427 has 2 divisors, whose sum is σ = 405826428. Its totient is φ = 405826426.

The previous prime is 405826391. The next prime is 405826429. The reversal of 405826427 is 724628504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405826427 - 2⁸ = 405826171 is a prime.

Together with 405826429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405826429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202913213 + 202913214.

It is an arithmetic number, because the mean of its divisors is an integer number (202913214).

Almost surely, 2^405826427 is an apocalyptic number.

405826427 is a deficient number, since it is larger than the sum of its proper divisors (1).

405826427 is an equidigital number, since it uses as much as digits as its factorization.

405826427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 405826427 is about 20145.1340774888. The cubic root of 405826427 is about 740.3665258785.

The spelling of 405826427 in words is "four hundred five million, eight hundred twenty-six thousand, four hundred twenty-seven".