99081569 has 2 divisors, whose sum is σ = 99081570. Its totient is φ = 99081568.

The previous prime is 99081547. The next prime is 99081581. The reversal of 99081569 is 96518099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89397025 + 9684544 = 9455^2 + 3112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99081569 is a prime.

It is a super-2 number, since 2×99081569² = 19634314631003522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99081529) 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, 49540784 + 49540785.

It is an arithmetic number, because the mean of its divisors is an integer number (49540785).

Almost surely, 2^99081569 is an apocalyptic number.

It is an amenable number.

99081569 is a deficient number, since it is larger than the sum of its proper divisors (1).

99081569 is an equidigital number, since it uses as much as digits as its factorization.

99081569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 99081569 is about 9953.9725235707. The cubic root of 99081569 is about 462.7335177228.

The spelling of 99081569 in words is "ninety-nine million, eighty-one thousand, five hundred sixty-nine".