99685247 has 2 divisors, whose sum is σ = 99685248. Its totient is φ = 99685246.

The previous prime is 99685211. The next prime is 99685249. The reversal of 99685247 is 74258699.

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-99685247 is a prime.

Together with 99685249, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99685195 and 99685204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99685249) 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, 49842623 + 49842624.

It is an arithmetic number, because the mean of its divisors is an integer number (49842624).

Almost surely, 2^99685247 is an apocalyptic number.

99685247 is a deficient number, since it is larger than the sum of its proper divisors (1).

99685247 is an equidigital number, since it uses as much as digits as its factorization.

99685247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 99685247 is about 9984.2499467912. The cubic root of 99685247 is about 463.6713868630.

The spelling of 99685247 in words is "ninety-nine million, six hundred eighty-five thousand, two hundred forty-seven".