91980700 has 72 divisors (see below), whose sum is σ = 230547744. Its totient is φ = 31200000.

The previous prime is 91980673. The next prime is 91980709. The reversal of 91980700 is 708919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91980709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70050 + ... + 71350.

It is an arithmetic number, because the mean of its divisors is an integer number (3202052).

Almost surely, 2^91980700 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 91980700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115273872).

91980700 is an abundant number, since it is smaller than the sum of its proper divisors (138567044).

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

91980700 is a wasteful number, since it uses less digits than its factorization.

91980700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 91980700 is about 9590.6569118074. The cubic root of 91980700 is about 451.4041735504.

The spelling of 91980700 in words is "ninety-one million, nine hundred eighty thousand, seven hundred".