99999199387 has 2 divisors, whose sum is σ = 99999199388. Its totient is φ = 99999199386.

The previous prime is 99999199343. The next prime is 99999199393. The reversal of 99999199387 is 78399199999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99999199387 - 2¹¹ = 99999197339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99999199387.

It is not a weakly prime, because it can be changed into another prime (99999199987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999599693 + 49999599694.

It is an arithmetic number, because the mean of its divisors is an integer number (49999599694).

Almost surely, 2^99999199387 is an apocalyptic number.

99999199387 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999199387 is an equidigital number, since it uses as much as digits as its factorization.

99999199387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 803538792, while the sum is 82.

The spelling of 99999199387 in words is "ninety-nine billion, nine hundred ninety-nine million, one hundred ninety-nine thousand, three hundred eighty-seven".