405689936087 has 2 divisors, whose sum is σ = 405689936088. Its totient is φ = 405689936086.

The previous prime is 405689936063. The next prime is 405689936117. The reversal of 405689936087 is 780639986504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405689936087 - 2²⁰ = 405688887511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405689936027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202844968043 + 202844968044.

It is an arithmetic number, because the mean of its divisors is an integer number (202844968044).

Almost surely, 2^405689936087 is an apocalyptic number.

405689936087 is a deficient number, since it is larger than the sum of its proper divisors (1).

405689936087 is an equidigital number, since it uses as much as digits as its factorization.

405689936087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 405689936087 in words is "four hundred five billion, six hundred eighty-nine million, nine hundred thirty-six thousand, eighty-seven".