999998854087 has 2 divisors, whose sum is σ = 999998854088. Its totient is φ = 999998854086.

The previous prime is 999998854069. The next prime is 999998854111. The reversal of 999998854087 is 780458899999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999998854087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999998853995 and 999998854013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998858087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999427043 + 499999427044.

It is an arithmetic number, because the mean of its divisors is an integer number (499999427044).

Almost surely, 2^999998854087 is an apocalyptic number.

999998854087 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998854087 is an equidigital number, since it uses as much as digits as its factorization.

999998854087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4232632320, while the sum is 85.

The spelling of 999998854087 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred fifty-four thousand, eighty-seven".