91095878 has 16 divisors (see below), whose sum is σ = 139270560. Its totient is φ = 44680896.

The previous prime is 91095871. The next prime is 91095883. The reversal of 91095878 is 87859019.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91095871) 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, 20426 + ... + 24482.

It is an arithmetic number, because the mean of its divisors is an integer number (8704410).

Almost surely, 2^91095878 is an apocalyptic number.

91095878 is a deficient number, since it is larger than the sum of its proper divisors (48174682).

91095878 is a wasteful number, since it uses less digits than its factorization.

91095878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 91095878 is about 9544.4160638564. The cubic root of 91095878 is about 449.9520574439.

The spelling of 91095878 in words is "ninety-one million, ninety-five thousand, eight hundred seventy-eight".