405426887 has 2 divisors, whose sum is σ = 405426888. Its totient is φ = 405426886.

The previous prime is 405426869. The next prime is 405426893. The reversal of 405426887 is 788624504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405426887 - 2⁶ = 405426823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405426187) 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, 202713443 + 202713444.

It is an arithmetic number, because the mean of its divisors is an integer number (202713444).

Almost surely, 2^405426887 is an apocalyptic number.

405426887 is a deficient number, since it is larger than the sum of its proper divisors (1).

405426887 is an equidigital number, since it uses as much as digits as its factorization.

405426887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 405426887 is about 20135.2150969390. The cubic root of 405426887 is about 740.1234801248.

The spelling of 405426887 in words is "four hundred five million, four hundred twenty-six thousand, eight hundred eighty-seven".