405135439 has 2 divisors, whose sum is σ = 405135440. Its totient is φ = 405135438.

The previous prime is 405135433. The next prime is 405135469. The reversal of 405135439 is 934531504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405135439 - 2³ = 405135431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405135431) 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, 202567719 + 202567720.

It is an arithmetic number, because the mean of its divisors is an integer number (202567720).

Almost surely, 2^405135439 is an apocalyptic number.

405135439 is a deficient number, since it is larger than the sum of its proper divisors (1).

405135439 is an equidigital number, since it uses as much as digits as its factorization.

405135439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 405135439 is about 20127.9765252248. The cubic root of 405135439 is about 739.9460875016.

The spelling of 405135439 in words is "four hundred five million, one hundred thirty-five thousand, four hundred thirty-nine".