91270000 has 50 divisors (see below), whose sum is σ = 220998008. Its totient is φ = 36504000.

The previous prime is 91269979. The next prime is 91270001. The reversal of 91270000 is 7219.

It is a tau number, because it is divible by the number of its divisors (50).

It is a self number, because there is not a number n which added to its sum of digits gives 91270000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91270001) 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 9 ways as a sum of consecutive naturals, for example, 5437 + ... + 14563.

Almost surely, 2^91270000 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 91270000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110499004).

91270000 is an abundant number, since it is smaller than the sum of its proper divisors (129728008).

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

91270000 is an equidigital number, since it uses as much as digits as its factorization.

91270000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9155 (or 9134 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 91270000 is about 9553.5333777613. The cubic root of 91270000 is about 450.2385566402.

Adding to 91270000 its reverse (7219), we get a palindrome (91277219).

The spelling of 91270000 in words is "ninety-one million, two hundred seventy thousand".