99390291020729 has 2 divisors, whose sum is σ = 99390291020730. Its totient is φ = 99390291020728.

The previous prime is 99390291020659. The next prime is 99390291020749. The reversal of 99390291020729 is 92702019209399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85912229143225 + 13478061877504 = 9268885^2 + 3671248^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99390291020729 is a prime.

It is not a weakly prime, because it can be changed into another prime (99390291020749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49695145510364 + 49695145510365.

It is an arithmetic number, because the mean of its divisors is an integer number (49695145510365).

Almost surely, 2^{99390291020729} is an apocalyptic number.

It is an amenable number.

99390291020729 is a deficient number, since it is larger than the sum of its proper divisors (1).

99390291020729 is an equidigital number, since it uses as much as digits as its factorization.

99390291020729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9920232, while the sum is 62.

The spelling of 99390291020729 in words is "ninety-nine trillion, three hundred ninety billion, two hundred ninety-one million, twenty thousand, seven hundred twenty-nine".