99999617 has 2 divisors, whose sum is σ = 99999618. Its totient is φ = 99999616.

The previous prime is 99999611. The next prime is 99999623. The reversal of 99999617 is 71699999.

It is a balanced prime because it is at equal distance from previous prime (99999611) and next prime (99999623).

It can be written as a sum of positive squares in only one way, i.e., 66080641 + 33918976 = 8129^2 + 5824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99999617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99999611) 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, 49999808 + 49999809.

It is an arithmetic number, because the mean of its divisors is an integer number (49999809).

Almost surely, 2^99999617 is an apocalyptic number.

It is an amenable number.

99999617 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999617 is an equidigital number, since it uses as much as digits as its factorization.

99999617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2480058, while the sum is 59.

The square root of 99999617 is about 9999.9808499817. The cubic root of 99999617 is about 464.1582907843.

The spelling of 99999617 in words is "ninety-nine million, nine hundred ninety-nine thousand, six hundred seventeen".