99916792891 has 2 divisors, whose sum is σ = 99916792892. Its totient is φ = 99916792890.

The previous prime is 99916792861. The next prime is 99916792897. The reversal of 99916792891 is 19829761999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99916792891 - 2¹¹ = 99916790843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99916792891.

It is not a weakly prime, because it can be changed into another prime (99916792897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49958396445 + 49958396446.

It is an arithmetic number, because the mean of its divisors is an integer number (49958396446).

Almost surely, 2^99916792891 is an apocalyptic number.

99916792891 is a deficient number, since it is larger than the sum of its proper divisors (1).

99916792891 is an equidigital number, since it uses as much as digits as its factorization.

99916792891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39680928, while the sum is 70.

The spelling of 99916792891 in words is "ninety-nine billion, nine hundred sixteen million, seven hundred ninety-two thousand, eight hundred ninety-one".