91229049 has 24 divisors (see below), whose sum is σ = 134464512. Its totient is φ = 59590080.

The previous prime is 91229011. The next prime is 91229071. The reversal of 91229049 is 94092219.

It is not a de Polignac number, because 91229049 - 2¹² = 91224953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91229549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125124 + ... + 125850.

It is an arithmetic number, because the mean of its divisors is an integer number (5602688).

Almost surely, 2^91229049 is an apocalyptic number.

It is an amenable number.

91229049 is a deficient number, since it is larger than the sum of its proper divisors (43235463).

91229049 is a wasteful number, since it uses less digits than its factorization.

91229049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 91229049 is about 9551.3898988577. The cubic root of 91229049 is about 450.1712089269.

The spelling of 91229049 in words is "ninety-one million, two hundred twenty-nine thousand, forty-nine".