99566549 has 2 divisors, whose sum is σ = 99566550. Its totient is φ = 99566548.

The previous prime is 99566527. The next prime is 99566561. The reversal of 99566549 is 94566599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99400900 + 165649 = 9970^2 + 407^2 .

It is an emirp because it is prime and its reverse (94566599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99566549 - 2⁸ = 99566293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99566549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99566249) 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, 49783274 + 49783275.

It is an arithmetic number, because the mean of its divisors is an integer number (49783275).

Almost surely, 2^99566549 is an apocalyptic number.

It is an amenable number.

99566549 is a deficient number, since it is larger than the sum of its proper divisors (1).

99566549 is an equidigital number, since it uses as much as digits as its factorization.

99566549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2624400, while the sum is 53.

The square root of 99566549 is about 9978.3039139926. The cubic root of 99566549 is about 463.4872782911.

The spelling of 99566549 in words is "ninety-nine million, five hundred sixty-six thousand, five hundred forty-nine".