999816072287 has 2 divisors, whose sum is σ = 999816072288. Its totient is φ = 999816072286.

The previous prime is 999816072263. The next prime is 999816072313. The reversal of 999816072287 is 782270618999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999816072287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999816072487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499908036143 + 499908036144.

It is an arithmetic number, because the mean of its divisors is an integer number (499908036144).

Almost surely, 2^999816072287 is an apocalyptic number.

999816072287 is a deficient number, since it is larger than the sum of its proper divisors (1).

999816072287 is an equidigital number, since it uses as much as digits as its factorization.

999816072287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 68.

The spelling of 999816072287 in words is "nine hundred ninety-nine billion, eight hundred sixteen million, seventy-two thousand, two hundred eighty-seven".