99784950871 has 2 divisors, whose sum is σ = 99784950872. Its totient is φ = 99784950870.

The previous prime is 99784950763. The next prime is 99784950901. The reversal of 99784950871 is 17805948799.

It is a strong prime.

It is an emirp because it is prime and its reverse (17805948799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99784950871 - 2²¹ = 99782853719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99784950797 and 99784950806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99784950571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49892475435 + 49892475436.

It is an arithmetic number, because the mean of its divisors is an integer number (49892475436).

Almost surely, 2^99784950871 is an apocalyptic number.

99784950871 is a deficient number, since it is larger than the sum of its proper divisors (1).

99784950871 is an equidigital number, since it uses as much as digits as its factorization.

99784950871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 67.

The spelling of 99784950871 in words is "ninety-nine billion, seven hundred eighty-four million, nine hundred fifty thousand, eight hundred seventy-one".