91009064 has 16 divisors (see below), whose sum is σ = 172238400. Its totient is φ = 45078832.

The previous prime is 91009063. The next prime is 91009073. The reversal of 91009064 is 46090019.

It is not an unprimeable number, because it can be changed into a prime (91009063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52304 + ... + 54015.

It is an arithmetic number, because the mean of its divisors is an integer number (10764900).

Almost surely, 2^91009064 is an apocalyptic number.

It is an amenable number.

91009064 is a deficient number, since it is larger than the sum of its proper divisors (81229336).

91009064 is a wasteful number, since it uses less digits than its factorization.

91009064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106432 (or 106428 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 91009064 is about 9539.8670850280. The cubic root of 91009064 is about 449.8090778564.

The spelling of 91009064 in words is "ninety-one million, nine thousand, sixty-four".