99742024817 has 2 divisors, whose sum is σ = 99742024818. Its totient is φ = 99742024816.

The previous prime is 99742024777. The next prime is 99742024859. The reversal of 99742024817 is 71842024799.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59892283441 + 39849741376 = 244729^2 + 199624^2 .

It is an emirp because it is prime and its reverse (71842024799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99742024817 - 2²² = 99737830513 is a prime.

It is not a weakly prime, because it can be changed into another prime (99744024817) 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, 49871012408 + 49871012409.

It is an arithmetic number, because the mean of its divisors is an integer number (49871012409).

Almost surely, 2^99742024817 is an apocalyptic number.

It is an amenable number.

99742024817 is a deficient number, since it is larger than the sum of its proper divisors (1).

99742024817 is an equidigital number, since it uses as much as digits as its factorization.

99742024817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 99742024817 in words is "ninety-nine billion, seven hundred forty-two million, twenty-four thousand, eight hundred seventeen".