99943847 has 2 divisors, whose sum is σ = 99943848. Its totient is φ = 99943846.

The previous prime is 99943841. The next prime is 99943873. The reversal of 99943847 is 74834999.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (74834999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99943847 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 (99943841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49971923 + 49971924.

It is an arithmetic number, because the mean of its divisors is an integer number (49971924).

Almost surely, 2^99943847 is an apocalyptic number.

99943847 is a deficient number, since it is larger than the sum of its proper divisors (1).

99943847 is an equidigital number, since it uses as much as digits as its factorization.

99943847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 99943847 is about 9997.1919557444. The cubic root of 99943847 is about 464.0719873818.

The spelling of 99943847 in words is "ninety-nine million, nine hundred forty-three thousand, eight hundred forty-seven".