98999917 has 2 divisors, whose sum is σ = 98999918. Its totient is φ = 98999916.

The previous prime is 98999911. The next prime is 98999963. The reversal of 98999917 is 71999989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97397161 + 1602756 = 9869^2 + 1266^2 .

It is an emirp because it is prime and its reverse (71999989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98999917 - 2¹¹ = 98997869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98999911) 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, 49499958 + 49499959.

It is an arithmetic number, because the mean of its divisors is an integer number (49499959).

Almost surely, 2^98999917 is an apocalyptic number.

It is an amenable number.

98999917 is a deficient number, since it is larger than the sum of its proper divisors (1).

98999917 is an equidigital number, since it uses as much as digits as its factorization.

98999917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 61.

The square root of 98999917 is about 9949.8702001584. The cubic root of 98999917 is about 462.6063716376.

The spelling of 98999917 in words is "ninety-eight million, nine hundred ninety-nine thousand, nine hundred seventeen".