99680397847 has 2 divisors, whose sum is σ = 99680397848. Its totient is φ = 99680397846.

The previous prime is 99680397833. The next prime is 99680397899. The reversal of 99680397847 is 74879308699.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99680397847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99680377847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49840198923 + 49840198924.

It is an arithmetic number, because the mean of its divisors is an integer number (49840198924).

Almost surely, 2^99680397847 is an apocalyptic number.

99680397847 is a deficient number, since it is larger than the sum of its proper divisors (1).

99680397847 is an equidigital number, since it uses as much as digits as its factorization.

99680397847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164602368, while the sum is 70.

The spelling of 99680397847 in words is "ninety-nine billion, six hundred eighty million, three hundred ninety-seven thousand, eight hundred forty-seven".