99713209 has 2 divisors, whose sum is σ = 99713210. Its totient is φ = 99713208.

The previous prime is 99713191. The next prime is 99713213. The reversal of 99713209 is 90231799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96727225 + 2985984 = 9835^2 + 1728^2 .

It is a cyclic number.

It is not a de Polignac number, because 99713209 - 2²⁵ = 66158777 is a prime.

It is not a weakly prime, because it can be changed into another prime (99713239) 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, 49856604 + 49856605.

It is an arithmetic number, because the mean of its divisors is an integer number (49856605).

Almost surely, 2^99713209 is an apocalyptic number.

It is an amenable number.

99713209 is a deficient number, since it is larger than the sum of its proper divisors (1).

99713209 is an equidigital number, since it uses as much as digits as its factorization.

99713209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 99713209 is about 9985.6501540961. The cubic root of 99713209 is about 463.7147365315.

The spelling of 99713209 in words is "ninety-nine million, seven hundred thirteen thousand, two hundred nine".