91080945 has 48 divisors (see below), whose sum is σ = 164736000. Its totient is φ = 46500480.

The previous prime is 91080937. The next prime is 91080947. The reversal of 91080945 is 54908019.

It is not a de Polignac number, because 91080945 - 2³ = 91080937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91080947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151756 + ... + 152354.

It is an arithmetic number, because the mean of its divisors is an integer number (3432000).

Almost surely, 2^91080945 is an apocalyptic number.

It is an amenable number.

91080945 is a deficient number, since it is larger than the sum of its proper divisors (73655055).

91080945 is a wasteful number, since it uses less digits than its factorization.

91080945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 91080945 is about 9543.6337419245. The cubic root of 91080945 is about 449.9274697918.

The spelling of 91080945 in words is "ninety-one million, eighty thousand, nine hundred forty-five".