91006916 has 144 divisors (see below), whose sum is σ = 231662592. Its totient is φ = 30643200.

The previous prime is 91006897. The next prime is 91006957. The reversal of 91006916 is 61960019.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 476381 + ... + 476571.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^91006916 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 91006916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115831296).

91006916 is an abundant number, since it is smaller than the sum of its proper divisors (140655676).

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

91006916 is a wasteful number, since it uses less digits than its factorization.

91006916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 91006916 is about 9539.7545041788. The cubic root of 91006916 is about 449.8055390239.

The spelling of 91006916 in words is "ninety-one million, six thousand, nine hundred sixteen".