99517213 has 2 divisors, whose sum is σ = 99517214. Its totient is φ = 99517212.

The previous prime is 99517207. The next prime is 99517237. The reversal of 99517213 is 31271599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78375609 + 21141604 = 8853^2 + 4598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99517213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99517273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49758606 + 49758607.

It is an arithmetic number, because the mean of its divisors is an integer number (49758607).

Almost surely, 2^99517213 is an apocalyptic number.

It is an amenable number.

99517213 is a deficient number, since it is larger than the sum of its proper divisors (1).

99517213 is an equidigital number, since it uses as much as digits as its factorization.

99517213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 37.

The square root of 99517213 is about 9975.8314440452. The cubic root of 99517213 is about 463.4107117920.

The spelling of 99517213 in words is "ninety-nine million, five hundred seventeen thousand, two hundred thirteen".