99785947 has 2 divisors, whose sum is σ = 99785948. Its totient is φ = 99785946.

The previous prime is 99785921. The next prime is 99785957. The reversal of 99785947 is 74958799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99785947 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99785891 and 99785900.

It is not a weakly prime, because it can be changed into another prime (99785957) 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, 49892973 + 49892974.

It is an arithmetic number, because the mean of its divisors is an integer number (49892974).

Almost surely, 2^99785947 is an apocalyptic number.

99785947 is a deficient number, since it is larger than the sum of its proper divisors (1).

99785947 is an equidigital number, since it uses as much as digits as its factorization.

99785947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 58.

The square root of 99785947 is about 9989.2916165262. The cubic root of 99785947 is about 463.8274647733.

The spelling of 99785947 in words is "ninety-nine million, seven hundred eighty-five thousand, nine hundred forty-seven".