91895091 has 8 divisors (see below), whose sum is σ = 124078080. Its totient is φ = 60487752.

The previous prime is 91895071. The next prime is 91895099. The reversal of 91895091 is 19059819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91895091 - 2¹⁴ = 91878707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91895099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193635 + ... + 194108.

It is an arithmetic number, because the mean of its divisors is an integer number (15509760).

Almost surely, 2^91895091 is an apocalyptic number.

91895091 is a deficient number, since it is larger than the sum of its proper divisors (32182989).

91895091 is a wasteful number, since it uses less digits than its factorization.

91895091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387825.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 91895091 is about 9586.1927270424. The cubic root of 91895091 is about 451.2640852667.

The spelling of 91895091 in words is "ninety-one million, eight hundred ninety-five thousand, ninety-one".