999997000087 has 2 divisors, whose sum is σ = 999997000088. Its totient is φ = 999997000086.

The previous prime is 999997000081. The next prime is 999997000103. The reversal of 999997000087 is 780000799999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999997000087 - 2³¹ = 997849516439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999996999986 and 999997000031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999997000081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998500043 + 499998500044.

It is an arithmetic number, because the mean of its divisors is an integer number (499998500044).

Almost surely, 2^999997000087 is an apocalyptic number.

999997000087 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997000087 is an equidigital number, since it uses as much as digits as its factorization.

999997000087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23147208, while the sum is 67.

The spelling of 999997000087 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, eighty-seven", and thus it is an aban number.