99788162231 has 2 divisors, whose sum is σ = 99788162232. Its totient is φ = 99788162230.

The previous prime is 99788162213. The next prime is 99788162237. The reversal of 99788162231 is 13226188799.

Together with previous prime (99788162213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13226188799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99788162231 is a prime.

It is a super-2 number, since 2×99788162231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99788162237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49894081115 + 49894081116.

It is an arithmetic number, because the mean of its divisors is an integer number (49894081116).

Almost surely, 2^99788162231 is an apocalyptic number.

99788162231 is a deficient number, since it is larger than the sum of its proper divisors (1).

99788162231 is an equidigital number, since it uses as much as digits as its factorization.

99788162231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The spelling of 99788162231 in words is "ninety-nine billion, seven hundred eighty-eight million, one hundred sixty-two thousand, two hundred thirty-one".