91068849 has 9 divisors (see below), whose sum is σ = 131585259. Its totient is φ = 60693480.

The previous prime is 91068841. The next prime is 91068853. The reversal of 91068849 is 94886019.

The square root of 91068849 is 9543.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6796449 + 84272400 = 2607^2 + 9180^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 91068849 - 2³ = 91068841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91068841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27039 + ... + 30219.

Almost surely, 2^91068849 is an apocalyptic number.

91068849 is the 9543-rd square number.

91068849 is the 4772-nd centered octagonal number.

It is an amenable number.

91068849 is a deficient number, since it is larger than the sum of its proper divisors (40516410).

91068849 is an frugal number, since it uses more digits than its factorization.

91068849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6368 (or 3184 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The cubic root of 91068849 is about 449.9075513789.

It can be divided in two parts, 9106 and 8849, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 91068849 in words is "ninety-one million, sixty-eight thousand, eight hundred forty-nine".