91093497 has 32 divisors (see below), whose sum is σ = 142331904. Its totient is φ = 51206400.

The previous prime is 91093489. The next prime is 91093507. The reversal of 91093497 is 79439019.

It is not a de Polignac number, because 91093497 - 2³ = 91093489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91093427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38688 + ... + 40974.

It is an arithmetic number, because the mean of its divisors is an integer number (4447872).

Almost surely, 2^91093497 is an apocalyptic number.

It is an amenable number.

91093497 is a deficient number, since it is larger than the sum of its proper divisors (51238407).

91093497 is a wasteful number, since it uses less digits than its factorization.

91093497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 91093497 is about 9544.2913304236. The cubic root of 91093497 is about 449.9481372329.

The spelling of 91093497 in words is "ninety-one million, ninety-three thousand, four hundred ninety-seven".