91225849 has 16 divisors (see below), whose sum is σ = 107533440. Its totient is φ = 76296960.

The previous prime is 91225847. The next prime is 91225867. The reversal of 91225849 is 94852219.

It is a cyclic number.

It is not a de Polignac number, because 91225849 - 2¹ = 91225847 is a prime.

It is a Duffinian number.

Its product of digits (51840) is a multiple of the sum of its prime divisors (2160).

It is not an unprimeable number, because it can be changed into a prime (91225847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50449 + ... + 52225.

It is an arithmetic number, because the mean of its divisors is an integer number (6720840).

Almost surely, 2^91225849 is an apocalyptic number.

It is an amenable number.

91225849 is a deficient number, since it is larger than the sum of its proper divisors (16307591).

91225849 is a wasteful number, since it uses less digits than its factorization.

91225849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its digits is 51840, while the sum is 40.

The square root of 91225849 is about 9551.2223825016. Note that the first 3 decimals coincide. The cubic root of 91225849 is about 450.1659453816.

The spelling of 91225849 in words is "ninety-one million, two hundred twenty-five thousand, eight hundred forty-nine".