91125011 has 6 divisors (see below), whose sum is σ = 95259780. Its totient is φ = 87162548.

The previous prime is 91124983. The next prime is 91125017. The reversal of 91125011 is 11052119.

It is not a de Polignac number, because 91125011 - 2¹⁰ = 91123987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91125017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85601 + ... + 86658.

It is an arithmetic number, because the mean of its divisors is an integer number (15876630).

Almost surely, 2^91125011 is an apocalyptic number.

91125011 is a deficient number, since it is larger than the sum of its proper divisors (4134769).

91125011 is a wasteful number, since it uses less digits than its factorization.

91125011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172305 (or 172282 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 91125011 is about 9545.9421221795. The cubic root of 91125011 is about 450.0000181070. Note that the first 4 decimals are identical.

The spelling of 91125011 in words is "ninety-one million, one hundred twenty-five thousand, eleven".