91487000 has 64 divisors (see below), whose sum is σ = 233569440. Its totient is φ = 33264000.

The previous prime is 91486981. The next prime is 91487009. The reversal of 91487000 is 78419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91487009) 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, 6842 + ... + 15158.

Almost surely, 2^91487000 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 91487000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116784720).

91487000 is an abundant number, since it is smaller than the sum of its proper divisors (142082440).

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

91487000 is a wasteful number, since it uses less digits than its factorization.

91487000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8349 (or 8335 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 91487000 is about 9564.8836898313. The cubic root of 91487000 is about 450.5950974468.

The spelling of 91487000 in words is "ninety-one million, four hundred eighty-seven thousand".