91000956 has 48 divisors (see below), whose sum is σ = 231235200. Its totient is φ = 27744192.

The previous prime is 91000933. The next prime is 91000963. The reversal of 91000956 is 65900019.

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, 270 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (4817400).

Almost surely, 2^91000956 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 91000956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115617600).

91000956 is an abundant number, since it is smaller than the sum of its proper divisors (140234244).

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

91000956 is a wasteful number, since it uses less digits than its factorization.

91000956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13818 (or 13816 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 91000956 is about 9539.4421220531. The cubic root of 91000956 is about 449.7957196253.

The spelling of 91000956 in words is "ninety-one million, nine hundred fifty-six", and thus it is an aban number.