99810947 has 2 divisors, whose sum is σ = 99810948. Its totient is φ = 99810946.

The previous prime is 99810923. The next prime is 99810967. The reversal of 99810947 is 74901899.

It is a strong prime.

It is an emirp because it is prime and its reverse (74901899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99810947 - 2⁸ = 99810691 is a prime.

It is not a weakly prime, because it can be changed into another prime (99810967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49905473 + 49905474.

It is an arithmetic number, because the mean of its divisors is an integer number (49905474).

Almost surely, 2^99810947 is an apocalyptic number.

99810947 is a deficient number, since it is larger than the sum of its proper divisors (1).

99810947 is an equidigital number, since it uses as much as digits as its factorization.

99810947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 99810947 is about 9990.5428781423. The cubic root of 99810947 is about 463.8661967415.

The spelling of 99810947 in words is "ninety-nine million, eight hundred ten thousand, nine hundred forty-seven".