91016772 has 96 divisors (see below), whose sum is σ = 267079680. Its totient is φ = 23435520.

The previous prime is 91016771. The next prime is 91016777. The reversal of 91016772 is 27761019.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (91016771) 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 31 ways as a sum of consecutive naturals, for example, 126229 + ... + 126947.

It is an arithmetic number, because the mean of its divisors is an integer number (2782080).

Almost surely, 2^91016772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91016772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133539840).

91016772 is an abundant number, since it is smaller than the sum of its proper divisors (176062908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91016772 is a wasteful number, since it uses less digits than its factorization.

91016772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 91016772 is about 9540.2710653314. The cubic root of 91016772 is about 449.8217763370.

The spelling of 91016772 in words is "ninety-one million, sixteen thousand, seven hundred seventy-two".