91127764 has 48 divisors (see below), whose sum is σ = 198822400. Its totient is φ = 35582976.

The previous prime is 91127761. The next prime is 91127779. The reversal of 91127764 is 46772119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91127761) 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, 27172 + ... + 30340.

Almost surely, 2^91127764 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 91127764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99411200).

91127764 is an abundant number, since it is smaller than the sum of its proper divisors (107694636).

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

91127764 is a wasteful number, since it uses less digits than its factorization.

91127764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272 (or 3270 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 91127764 is about 9546.0863184868. The cubic root of 91127764 is about 450.0045497482.

The spelling of 91127764 in words is "ninety-one million, one hundred twenty-seven thousand, seven hundred sixty-four".