99945617 has 2 divisors, whose sum is σ = 99945618. Its totient is φ = 99945616.

The previous prime is 99945611. The next prime is 99945623. The reversal of 99945617 is 71654999.

It is a balanced prime because it is at equal distance from previous prime (99945611) and next prime (99945623).

It can be written as a sum of positive squares in only one way, i.e., 86136961 + 13808656 = 9281^2 + 3716^2 .

It is a cyclic number.

It is not a de Polignac number, because 99945617 - 2⁶ = 99945553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99945611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49972808 + 49972809.

It is an arithmetic number, because the mean of its divisors is an integer number (49972809).

Almost surely, 2^99945617 is an apocalyptic number.

It is an amenable number.

99945617 is a deficient number, since it is larger than the sum of its proper divisors (1).

99945617 is an equidigital number, since it uses as much as digits as its factorization.

99945617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 50.

The square root of 99945617 is about 9997.2804802106. The cubic root of 99945617 is about 464.0747269287.

It can be divided in two parts, 99945 and 617, that multiplied together give a triangular number (61666065 = T₁₁₁₀₅).

The spelling of 99945617 in words is "ninety-nine million, nine hundred forty-five thousand, six hundred seventeen".