99991103 has 2 divisors, whose sum is σ = 99991104. Its totient is φ = 99991102.

The previous prime is 99991081. The next prime is 99991109. The reversal of 99991103 is 30119999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99991103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99991109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49995551 + 49995552.

It is an arithmetic number, because the mean of its divisors is an integer number (49995552).

Almost surely, 2^99991103 is an apocalyptic number.

99991103 is a deficient number, since it is larger than the sum of its proper divisors (1).

99991103 is an equidigital number, since it uses as much as digits as its factorization.

99991103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 99991103 is about 9999.5551401050. Note that the first 3 decimals coincide. The cubic root of 99991103 is about 464.1451175477.

The spelling of 99991103 in words is "ninety-nine million, nine hundred ninety-one thousand, one hundred three".