91400500 has 48 divisors (see below), whose sum is σ = 211380624. Its totient is φ = 34406400.

The previous prime is 91400497. The next prime is 91400537. The reversal of 91400500 is 500419.

It can be written as a sum of positive squares in 8 ways, for example, as 2965284 + 88435216 = 1722^2 + 9404^2 .

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3124 + ... + 13876.

It is an arithmetic number, because the mean of its divisors is an integer number (4403763).

Almost surely, 2^91400500 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 91400500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105690312).

91400500 is an abundant number, since it is smaller than the sum of its proper divisors (119980124).

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

91400500 is a wasteful number, since it uses less digits than its factorization.

91400500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10789 (or 10777 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 91400500 is about 9560.3608718500. The cubic root of 91400500 is about 450.4530416854.

Adding to 91400500 its reverse (500419), we get a palindrome (91900919).

The spelling of 91400500 in words is "ninety-one million, four hundred thousand, five hundred".