99709901 has 2 divisors, whose sum is σ = 99709902. Its totient is φ = 99709900.

The previous prime is 99709873. The next prime is 99709933. The reversal of 99709901 is 10990799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 48930025 = 7126^2 + 6995^2 .

It is a cyclic number.

It is not a de Polignac number, because 99709901 - 2¹⁰ = 99708877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99708901) 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, 49854950 + 49854951.

It is an arithmetic number, because the mean of its divisors is an integer number (49854951).

Almost surely, 2^99709901 is an apocalyptic number.

It is an amenable number.

99709901 is a deficient number, since it is larger than the sum of its proper divisors (1).

99709901 is an equidigital number, since it uses as much as digits as its factorization.

99709901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 99709901 is about 9985.4845150348. The cubic root of 99709901 is about 463.7096085405.

The spelling of 99709901 in words is "ninety-nine million, seven hundred nine thousand, nine hundred one".