99357921017 has 2 divisors, whose sum is σ = 99357921018. Its totient is φ = 99357921016.

The previous prime is 99357921011. The next prime is 99357921043. The reversal of 99357921017 is 71012975399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98354995456 + 1002925561 = 313616^2 + 31669^2 .

It is a cyclic number.

It is not a de Polignac number, because 99357921017 - 2⁴ = 99357921001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99357921017.

It is not a weakly prime, because it can be changed into another prime (99357921011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49678960508 + 49678960509.

It is an arithmetic number, because the mean of its divisors is an integer number (49678960509).

Almost surely, 2^99357921017 is an apocalyptic number.

It is an amenable number.

99357921017 is a deficient number, since it is larger than the sum of its proper divisors (1).

99357921017 is an equidigital number, since it uses as much as digits as its factorization.

99357921017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1071630, while the sum is 53.

The spelling of 99357921017 in words is "ninety-nine billion, three hundred fifty-seven million, nine hundred twenty-one thousand, seventeen".