99985549 has 2 divisors, whose sum is σ = 99985550. Its totient is φ = 99985548.

The previous prime is 99985547. The next prime is 99985559. The reversal of 99985549 is 94558999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94439524 + 5546025 = 9718^2 + 2355^2 .

It is a cyclic number.

It is not a de Polignac number, because 99985549 - 2¹ = 99985547 is a prime.

It is a super-2 number, since 2×99985549² = 19994220017662802, which contains 22 as substring.

Together with 99985547, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 99985493 and 99985502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99985547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992774 + 49992775.

It is an arithmetic number, because the mean of its divisors is an integer number (49992775).

Almost surely, 2^99985549 is an apocalyptic number.

It is an amenable number.

99985549 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985549 is an equidigital number, since it uses as much as digits as its factorization.

99985549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 58.

The square root of 99985549 is about 9999.2774238942. The cubic root of 99985549 is about 464.1365237508.

The spelling of 99985549 in words is "ninety-nine million, nine hundred eighty-five thousand, five hundred forty-nine".