999998858087 has 2 divisors, whose sum is σ = 999998858088. Its totient is φ = 999998858086.

The previous prime is 999998858069. The next prime is 999998858107. The reversal of 999998858087 is 780858899999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999998858087 - 2¹⁰ = 999998857063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999998857993 and 999998858011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998858687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999429043 + 499999429044.

It is an arithmetic number, because the mean of its divisors is an integer number (499999429044).

Almost surely, 2^999998858087 is an apocalyptic number.

999998858087 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998858087 is an equidigital number, since it uses as much as digits as its factorization.

999998858087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8465264640, while the sum is 89.

The spelling of 999998858087 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred fifty-eight thousand, eighty-seven".